08 October 1987
Supreme Court
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DELHI CLOTH & GENERAL MILLS LTD. Vs UNION OF INDIA

Bench: SHETTY,K.J. (J)
Case number: Appeal Civil 626 of 1972


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PETITIONER: DELHI CLOTH & GENERAL MILLS LTD.

       Vs.

RESPONDENT: UNION OF INDIA

DATE OF JUDGMENT08/10/1987

BENCH: SHETTY, K.J. (J) BENCH: SHETTY, K.J. (J) MUKHARJI, SABYASACHI (J)

CITATION:  1987 AIR 2414            1988 SCR  (1) 383  1988 SCC  (1)  86        JT 1987 (4)    35  1987 SCALE  (2)715  CITATOR INFO :  R          1988 SC 354  (11)  RF         1992 SC1075  (3)  RF         1992 SC2169  (28)

ACT:      Refusal of  permission by  the Railway  Board to charge concessional  station   to  station  freight  rate  for  the carriage of  Naptha for a fertilizer factory complaint under section 41(1)(a) and (b) of the Railways Act, 1980, against

HEADNOTE:      The appellant,  a company,  set up a fertilizer factory at Kota  in Rajasthan.  The factory  manufactures  urea  for which the  main raw  material is  Naptha, which  has  to  be transported from  the Koyali  Refinery  of  the  Indian  oil Corporation.      Before the  actual  setting  up  of  the  factory,  the appellant requested  the  Railway  Board  by  letter  for  a concessional frieght  rate for the carriage of Naptha to the factory. The Railway Board by its letter EX 5 dated November 5, 1966,  quoted station  to  station  rate  equal  to  85-B (special) as  against the  rate equivalent to classification 62.5-B requested  for by the appellant, and also stated that as the  special rate  was being  quoted ahead  of the actual setting up  of  the  factory,  the  frieght  rate  would  be reviewed when the traffic actually began to move.      When the  factory was  almost ready  for operation, the appellant again  requested the  Railway Board  by letter for charging the rate under classification 62-5-B instead of 85- B (special)  quoted by  it. The  Railway  Board  refused  to oblige. The  appellant wrote  another letter  to the  Board, requesting it to permit charging the rate equivalent to 85-B (special) pending  its final  decision, as  the movement  of naptha was  to commence  from June/July,  1968. The  Railway Board refused  to grant  that request  also, saying  that it could reconsider  the question  if on the basis of the facts and figures  of the  cost of  production vis-a-vis  the sale price of  the fertilizers,  it could be established that the production of  the  fertilisers  at  Kota  was  uneconomical unless freight  concession on  the movement  of  naptha  was granted.

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    The appellant  filed a complaint under section 41(1)(a) and (b)  of the Railways Act, 1890, before the Railway Rates Tribunal. The Tri- 384 bunal  decided   against  the   appellant.  Aggrieved,   the appellant appealed to this Court by special leave for relief against the order and judgment of the Tribunal.      Dismissing the appeal, the Court ^      HELD: Three  questions arise  for consideration  of the Court: (1)  whether the Railway Board was bound to allow the concessional rate  offered to  the appellant,  that is, 85-B (special) quoted in its letter Ex. C 5 dt. November 5, 1966, to the  appellant, (2)  whether the  rate  charged  for  the carriage of  the naptha  between the  stations concerned was unreasonable, and  (3) whether  the  Railways  were  showing undue preference or advantage in respect of other traffic in contravention  of  the  provisions  of  section  28  of  the Railways Act. [389E-F ]      Dealing with the third question first, which relates to the contravention  of section  28 of  the Railways  Act, the scope of the section was considered by this Court in Rajgarh Jute Mills  Ltd v.  Eastern Railway  and another, [1959] SCR 236 at  241, and the Railway Rates Tribunal, considering the material on record in the light of the decision of the Court in case,  held that  there was  no evidence  produced by the appellant to  justify any  grievance under  section 28. This conclusions is perfectly justified. [390E; 391C]      The second  question above-said  relates  to  the  rate charged  by   the  Railway   Administration  being   per  se unreasonable.  Even   assuming,  as  argued  by  appellant’s counsel, that  the Railways are earning some surplus income, that by itself is no ground to hold that the frieght charged is per  se unreasonable.  In  the  case  of  commodities  of national needs such as foodgrains, crude oil etc., it may be necessary for  the Railways  to charge  below the  operation cost, and to offset the loss, the Railways may charge higher freight for  some other  classified commodities. The cost of operation cannot  by itself  be the  basis for  judging  the reasonableness  of   the  rate   charged.  Counsel  for  the appellant  also  argued  that  crude  oil  and  naptha  were comparable commodities for the purpose of carriage but there was disparity  in the  rates charged  in respect of the two, naptha being  charged at  a much  higher rate.  The Tribunal rejected the demand of the appellant for parity in frieghts, and the  Court cannot  interfere with  the  finding  to  the Tribunal  in   this  appeal   under  Article   136  of   the Constitution. On  merits also,  there is no justification to demand that neptha should take the same freight rate as that of the crude oil. [391D, F-H; 392B. D-E] 385      Lastly,  the   first  question:   It  relates   to  the correctness of the view taken by the Tribunal on doctrine of promissory estoppel  consequent upon the letter Ex. 5 of the Railway Board.  The Tribunal  rejected  this  claim  of  the appellant. Considering  the conclusion  of the  Tribunal  on this question,  it appears  the Tribunal  has not  correctly understood the  doctrine of  promissory estoppel:  The party asserting the  estoppel must  have relied and acted upon the assurance given  to him.  It means  the party has changed or altered  the   position  by  relying  on  the  assurance  or representation. The  alteration of  position by the party is the only  indispensable requirement  of the  doctrine. It is not necessary  to prove  further any  damage,  detriment  or prejudice to  the party  asserting the  estoppel. "A promise

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intended to  be binding,  intended to  be acted upon, and in fact acted  upon, is binding", said Lord Denning, sitting as a trial judge in Central London Properties Ltd v. High trees House Ltd.,  [1947] K.B. 130. If the promisee has acted upon the promise,  the promisor  is precluded  from receding from his promise.  The concept  of detriment  as it is understood now  is   whether  it   appears  unjust,   unreasonable   or inequitable that  the promisor  should be  allowed to resile from his  assurance or representation, having regard to what the promisee has done or refrained from doing in reliance on the  assurance  or  representation.  It  is,  however  quite fundamental that  the doctrine of promissory estoppel cannot be used  to compel  the public  bodies or  The Government to carry out the representation or promise which is contrary to law or  which is outside their authority or power. Secondly, the estoppel stems from equitable doctrine. it requires that he who seeks equity must do equity. The doctrine, therefore, cannot also  be invoked  if it is found to be inequitable or unjust in  its enforcement.  or the  purpose of invoking the doctrine, it is not necessary for the appellant to show that the insurance  contained in  Ex. (I S was mainly responsible for the  establishing of  the factory  at Kota. There may be several  representation   to  one   party   from   different authorities in  regard to different matters. Or there may be several representations  from the  same party  in regard  to different matters;  In  the  instant  case,  there  was  one representation by  the Rajasthan  government to supply power to the  appellant’s factory  at concessional  rate. There is another representation  from the  same government  to exempt the appellant  from payment  of tax for a certain period. If those  representations   have  been   relied  upon   by  the appellant, the  Court would compel the authorities to adhere to their  representations. What is required is the fact that the appellant was induced to act on the representations.      The assurance  given by the Railway Board in the letter Ex. S  was not  clear and  unqualified. it  was  subject  to review to be undertaken 386 when  the   appellant  started   moving  the  raw  material. Accordingly, A  appellant was  put to  notice that it has to approach the  Railway administration  again  when  it  would review the  whole matter.  From the  tenor  of  Ex.  5,  the railways are  entitled to  say that  they have  reviewed the matter and found no justification for a concessional frieght rate for  naptha; that  does not amount to resiling from the earlier assurance.  No question of estoppel arises in favour of the  appellant in the case out of the representation made in Ex  5. The  Court  agreed  with  the  conclusion  of  the Tribunal but not for all the reasons stated.      Rajgarh Jute Mills Ltd v. Eastern Railway & Anr, [1959] SCR 234  at 241; Central London Properties Ltd v. High Trees House Ltd,  [1947] KB  130; Central Newbury Car Auctions Ltd v. Unity  Finance Ltd,  [1956] 3  All ER 905 at 909; Article "Recent Development in the Doctrine of Consideration"-Modern Law Review,  Vol. 15,  P. 5, Grundt v. The Great Boulder Ptv Gold, Mines  Ltd, [1938]  59 CLR  641; Mohlal Padampet Sugar Mills Co  Ltd v.  State of  UP and  ors, [1979] 2 SCR 641 at 695= [1979]  2 SCC  409; Union  of India  and ors v. Godfrey Philips Ltd,  [1985] 4  SCC 369=  [1985] Supp. 3 SCR 123 and Halsbury’s Laws  of England-4th Edn., Vol. 16, P. 1071, para 1595, referred to.

JUDGMENT:

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    CIVIL APPELLATE  JURISDICTION: Civil  Appeal No. 223 of 1974.      From the  Judgment and  order dated  13.7.1973  of  the Railways Rates Tribunal, Madras in Complaint No. 2 of 1969.      K.K. Jain,  Bishamber Lal, Pramod Dayal and A.D. Sanger for the Appellant.      Bed Brat Barua, Ms. A. Subhashini,.C.V. Subba Rao, Mrs. S. Suri, P. Parmeswaran and Anil Katiyar for the Respondent.      The Judgment of the Court was delivered by      JAGANNATHA SHETTY,  J. This appeal, with Special Leave, is against  the order  and judgment  dated July 13, 1973, of the Railways  Rates Tribunal  Madras, in  complaint filed by the appellant under Section 41(1) of the Indian Railways Act No. 9 of 1890. The background facts are these:      The appellant  is a Company. It has set up a fertilizer factory at 387 Kota in Rajasthan. It is said to be an industrially backward area. The  factory manufactures  Urea for which the main raw material is Naptha. Naptha has to be transported from Koyali Refinery of  Indian oil  Corporation.  The  nearest  railway station is  Bajuva near  Baroda. The nearest railway station serving Company’s  factory  is  Dadhevi  in  Rajasthan.  The distance between  Bajuva and  Dadhevi is  about 520 kms. For transportation,  the  Naptha  has  been  classified  by  the Railway under Clause 110-B of the tariff.      Before the  actual  setting  up  of  the  factory,  the Company, by its letter dated September 5, 1966 requested the Railway Board  for  a  concessional  frieght  rate  for  the carriage of Naptha. It requested the Railway Board for fixed Station to Station rate equivalent to classification 62.5-B. That would  have meant  reduction of about 43% in the normal tariff under clause 110-B. In that letter it was pointed out that if  such concessional  rate was  not fixed, the Company would be  put to  disadvantageous position  as  against  the other factories located at ports or near the refineries. The Railway Board  by its  letter Ex.  C5 dated November 5, 1966 agreed to  quote station  to  station  rate  equal  to  85-B (Special). In the said letter it was also stated that as the special rate was being quoted ahead of the actual setting up of the factory the freight rate need to be reviewed when the traffic actually begins to move.      When the  factory was  almost ready  for operation  the company wrote  a letter  dated June  5, 1967  requesting the Railway Board  for charging  the rate  under  classification 62.5-B instead  of 85-B(Special).  The Railway Board did not accede to  the request.  On May  31, 1968  the company wrote another letter informing the Railway Board that the movement of Naptha  would commence  from June/July  1968 and  pending decision of the company’s earlier request, the Railway Board may permit  charging the  rate equivalent  to 85-B (Special) already offered  in terms  of the  letter Ex. 5. The Railway Board refused to grant that request also. The Railway Board, however, informed  the Company  in the letter dated July 11, 1968 as follows:           "However, if  on the  basis of  facts and  figures           your cost  of production (date to be furnished for           at least  one complete  year) vis-a-vis  the  sale           price of  fertilizers, it  can be established that           production of fertilizers at Kota is uneconomical,           until freight concession on the movement of Naptha           from  Bajuva/Trombay   to  Kota  is  granted,  the           Railway Board  would be prepared to reconsider the           question." 388

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    on April  19, 1969, the company filed a complaint under Section 41(1)(a)  and (b)  of the  Railways Act, 1890 before the Railway Rates Tribunal Madras. The principal contentions raised in the complaint are as follows:           "(i)  The   Railway  Board   was  estopped  and/or           precluded from  going back  on  the  assurance  Of           quoting station  to station concessional rate 85-B           when the  company had  in vested a large amount of           capital in  setting up the factory at a place away           from the refinery or port (ii) The rate charges by           the Railway for the carriage of Naptha between two           stations-Bajuva and Dadhevi was unreasonable under           Section 41(1)(b) of the Indian Railways Act, 1980,           and  (iii)   The  Railways   were  showing   undue           preference  or   advantage  in  respect  of  other           traffic and contravening the provisions of Section           28 of the Indian Railway Act, 1890."      With these and other contentions, the company requested the tribunal to declare the rate charged for the carriage of Naptha as unreasonable and to fix a reasonable rate for such carriage.      The Railway  Board in  its reply  maintained that while quoting the concessional rate equal to 85-B (Special) it was made clear  to the  company that  the rate  was  subject  to review when  the traffic starts moving and that concessional rate was  provisional in  character.  The  company  did  not construct the  factory relying  solely on  the  concessional rate offered  by the  Railway Board.  There was no scope for any such  understanding since the Railway reserved its right to determine  the correct  rate  when  the  traffic  started moving. It  was later  found that  the chemicals  have  been advisedly given  low class  rate with  a view  to  encourage fertilizer industry  and no further concession was necessary to the  company. It  was further stated that the question of any undue  prejudice of  undue favour  to any party does not arise when charging the respective class rates for specified commodities.      On  these   pleadings  the  Tribunal  considered  among others, the following issues:      1.  Whether  freight  charges,  now  charged,  for  the      carriage of  a Company’s  traffic in Neptha from Bajuva      to Dadhevi station are unreasonable under Section 41(1)      of the Indian Railways Act, 1890? 389      2. Whether  the Railways are contravening Section 28 of      the Indian  Railways Act  in  charging  the  respective      class rates  for commodities  naptha, chemical manures,      divisions A & B, Urea and Gypsum?      3. Whether the Railways are estopped by the doctrine of      promissory estoppel  in view  of the assurance given in      the letter Ex. C?      The Tribunal determined all these questions against the company. It  was held  that there was no unreasonableness in the rate  charged for  the carriage of Naptha from Bajuva to Dadhevi. The Railways are not contravening Section 28 of the Railways Act.  The rate charged has not caused any prejudice to the  company. On the question of promissory estoppel, the Tribunal held  that the assurance given by the Railway Board in the  letter Ex. C5 was not mainly responsible for setting up of  fertilizer factory  at Kota. It was further held that even  if  Ex.  CS  was  an  assurance  to  the  Company  the withdrawal of  that assurance has not adversely affected the interests of the company.      Upon the  submissions made  by learned  counsel on both sides, the following questions arise for our consideration:

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    (1) Whether  the Railway  Board was  bound to  give the      concessional rate  offered to  the company under Ex. C5      dated November 5, 1966?      (2) Whether the rate charged for the carriage of Naptha      between Bajuva and Dadhevi is unreasonable?      (3) Whether  the Railways  are showing undue preference      or  advantage   in  respect   of  other   traffic   and      contravening  the  provisions  of  Section  28  of  the      Railways Act?      We may  conveniently take  up third  question first for consideration.      The relevant  provisions of  the  Railways  Act,  1890, which have a material bearing on the question are these: Section 41  provides for  filing complaints  against Railway Administration. The  Section provides  as follows, so far as it is material: 390      41(I) Any complaint that a railway administration      (a) is contravening the provisions of Section 28 or      (b) is  charging for  the  carriage  of  any  commodity      between two stations a rate which is unreasonable, or      (c) x x x x x           may be made to the Tribunal and the Tribunal shall           hear and  decide any  such complaint in accordance           with the provisions of this chapter. Section 28 provides:           "28. A  Railway administration  shall not  make or           give  any  undue  or  unreasonable  preference  or           advantage to,  or in  favour  of,  any  particular           person   or   railway   administration,   or   any           particular description  of traffic, in any respect           what soever,  or subject  any particular person or           railway   administration    or   any    particular           description   of   traffic   to   any   undue   or           unreasonable  prejudice  or  disadvantage  in  any           respect whatsoever. "      The third  question formulated  by us  relates, to  the contravention of  Section 28  of the Railways Act. The scope of this Section has been considered by this Court in Rajgarh Jute Mills  Ltd v  Eastern Railway  and another, [ 1959] SCR 236 at 241. There it was observed that a party who complains against the  railway administration  that the  provisions of Section 28  have been  contravened must establish that there has been preference between himself and his goods on the one hand  and  his  competitor  and  his  goods  on  the  other. Gajendragadkar, J. (as he then was) observed:           "Section 28  is obviously  based on  the principle           that  the  power  derived  from  the  monopoly  of           railway carriage  must be  used in a fair and just           manner  in   respect  of   all  persons   and  all           descriptions of  traffic passing  over the railway           area.  In   other  words,   equal  charges  should           normally be levied against persons or goods of the           same or  similar kinds  pas sing  over the same or           similar area  of the  railway lines  and under the           same or  similar circumstances; but this rule does           not  mean  that,  if  the  railway  administration           charges un- 391           equal rates  in respect  of the  same  or  similar           class of goods travelling over the same or similar           areas, the inequality of rates necessarily attract           the provisions  of S.  28. All  cases  of  unequal           rates cannot  necessarily be  treated as  cases of           preference because  the very concept of preference

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         postulates  competition   between  the  person  of           traffic receiving  preference and  the  person  or           traffic suffering  prejudice in consequence. It is           only as between competitors in the same trade that           a complaint  of preference  can be  made by one in           reference to the other."      In  the   light  of   these  principles,  the  Tribunal considering the  material on  record held  that there  is no evidence produced  by the  Company to  justify any grievance under Section  28. We  see no  reason to  disagree with this conclusion. It  is, in  our opinion, perfectly justified. In fact Mr.  K.K. Jain  learned counsel  for the appellant also did not  seriously dispute  the correctness  of that finding recorded by the Tribunal.      We may  now turn  to the  second question.Mr. K.K. Jain urged that the rate charged by the Railway Administration is per se  unreasonable. Here  again  the  onus  to  prove  the alleged  unreasonableness   of  the  freight  rests  on  the company. It  is for  the company  to establish that the rate charged by  the Railway  Administration for  the carriage of Naptha is  unreasonable.  Of  course,  this  onus  could  be discharged by  relying upon  the material  produced  by  the Railways. Mr.  Jain, therefore,  relied upon a statement Ex. C46 in  support of  his case.  Ex. C46  is  a  statement  of surplus "working cost" in respect of carriage of Naptha from Bajuva to  Dadhevi. It  is, in our opinion, not necessary to analyse the  statement. Even  assuming that the railways are earning some  surplus income  after deducting  the operation cost that  by itself  is no  ground to hold that the freight charged is per se unreasonable. It must be born in mind that the railways  are run  as commercial  undertaking and at the same time  it being  an instrumentality of the State, should serve the  national interest  as well.  There is however, no obligation on  the railways  to pass  on  the  extra  amount realised by  the carriage  of goods  to customers. Nor it is necessary to  share the  profit with  the commuters.  As Mr. Barua learned counsel for the Railways said that in the case of commodities  of national  needs such  a foodgrains, crude oil etc.,  it may  be necessary  for the  Railways to charge below the  operation cost.  To  off  set  such  a  loss  the Railways  may   charge  higher  freight  for  certain  other classified commodities.  Therefore, it seems to us, that the cost of  operation cannot by itself be the basis for judging the reasonableness of the rate changed. 392      It was  next urged  by Mr. K.K. Jain that the crude oil and Naptha  are considered as comparable commodities for the purpose of carriage. The crude oil carries the rate equal to class 85-B(old),  85(new) while  Naptha  carries  rate  110- B(old), 105-B(new).  In terms  of amounts  it works  out  at Rs.59.45 for  crude oil  as against Rs.73.13 for Naptha. The counsel urged  that there is no justification shown for this wide disparity  in the  first place.  Secondly, the  freight rate of  crude oil was the rate offered to the company under Ex. CS  and the  denial of that rate without any good reason is arbitrary. This argument though attractive does not carry conviction if one analyses the evidence on record. Crude oil has been  clubbed with  Glycerine, fruit  juices and syrups, fibres, flax  etc. Naptha  has been  clubbed  with  Aviation Spirit, Petrol,  Petroleum, Ether  and solvent oil. From the evidence produced by the Railways Naptha has been classified as a  dangerous commodity  with the flash point below 24.4øC spontaneously.  The   crude  oil   has  no   such  dangerous characteristics. It  is also  on record that Naptha requires special type  of tank  wagons and  the Railways have to take

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special precautions  for  transportation.  These  and  other relevant  factors  have  been  taken  into  account  by  the Tribunal for  rejecting the demand of the company for parity in freights.  This  Court  cannot,  interfere  with  such  a finding  in   this  appeal   under  Article   136   of   the Constitution. On the merits also, we see no justification to demand that Neptha should take the same freight rate as that of crude oil.      We may  now revert to the first question. It relates to the correctness  of the  view taken  by the  Tribunal on the doctrine of  promissory estoppel resulting by the letter Ex. CS of  the Railway  Board. The  Tribunal has  rejected  this claim of  the company  by summarising  its conclusion in the following terms:           "We  must,  therefore,  hold  that  the  assurance           contained in  . Ext. CS was not mainly responsible           for the  setting up  of the  Fertilizer Factory at           Kota. 15.3.  Even if it was held that Ex. CS was a           definite encouragement  to the  complainant to set           up the  Kota factory,  there  is  no  evidence  on           record  to   show  that   the  withdrawal  of  the           concession by  Ex. 12  has adversely  affected the           complainant. We  will show  in the  (i  succeeding           paragraphs that  the complainant  has suffered  no           material injury by virtue of the withdrawal of the           concessional rate  and the  charging of the normal           rate. It  is well  settled that  the principle  of           estoppel  cannot  be  applied  unless  the  person           pleading  estoppel  can  show  that  he  has  been           prejudiced by  the conduct  of the  party on whose           assurance l l he has acted." 393      Here the Railways Rates Tribunal apparently, appears to have gone off the track. The doctrine of promissory estoppel has not  been correctly  understood by  the Tribunal.  It is true, that  is the  formative period,  it was generally said that the  doctrine of  promissory estoppel cannot be invoked by the  promisee  unless  he  has  suffered  ’detriment’  or ’prejudice’. It  was  often  said  simply,  that  the  party asserting the  estoppel must have been induced to act to his detriment. But  this has  now  been  explained  in  so  many decisions all  over. All  that is  now required  is that the party asserting  the  estoppel  must  have  acted  upon  the assurance  given   to  him.   Must  have   relied  upon  the representation made  to him. It means, the party has changed or altered  the position  by relying on the assurance or the representation. The,alteration  of position  by the party is the only  indispensable requirement  of the  doctrine. It is not necessary  to prove  further any  damage,  detriment  or prejudice to  the party  asserting the  estoppel. The Court, however, would  compel the  opposite party  to adhere to the representation acted  upon or  abstained  from  acting.  The entire doctrine  proceeds on the promise that it is reliance based and nothing more.      This principle  would be clear if we study the cases in which the  doctrine has been applied even since it was burst out into  sudden blaze  in 1946.  Lord  Denning  in  Central London Properties  Ltd v  High Trees  House Ltd, 11947] K.B. 130 sitting as a trial judge, asserted:           "A promise  intended to be binding, intended to be           acted upon,  and in  fact acted  upon  is  binding           .......      The history  of the  High Trees  principle is  too well known to  bear repetition.  It will  be enough  to make  the following points.  The promisor  is bound because he led the

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promisee to  commit himself  to change  the position. If the promisee has  acted  upon  the  promise,  the  promisor  is. precluded from receding his promise. No further detriment to the  promisee   upon  his   temporal   interests   need   be established. This  position has  been  made  clear  by  Lord Denning himself  in his  article "Recent Developments in the Doctrine of  Consideration" Modern Law Review, Vol. 15 at p. 5.           "A man  should keep his word. All the more so when           the promise is not a bare promise but is made with           the intention that the other party should act upon           it. Just  a contract  is different  from tort  and           from estoppel,  so also  in the  sphere now  under           discussion promises  may give  rise to a different           equity from other conduct. 394           The difference may lie in the necessity of showing           "detriment" where  one party deliberately promises           to waive,  modify or  discharge his  strict  legal           rights, intending  the other  party to  act on the           faith of  promise, and  the other  party  actually           does act  on it,  then it is contrary, not only to           equity but  also  to  good  faith,  to  allow  the           promisor to  go back on his promise. It should not           be necessary  for the  other party to show that he           acted to his detriment in reliance on the promise.           It should be sufficient that he acted on it.      The principle  governing this  branch  of  the  subject cannot be better put then in the wolds of a great Australian jurist, DIXON,  J. in  Grundt v  The Great  Boulder Pty Gold Mines Ltd, [1938] 59 CLR 641. There he said:           "It is  often said simply that the party asserting           the estoppel  must have been induced to act to his           detriment. Although substantially such a statement           is correct  and leads  to no  misunderstanding, it           does not  bring out  clearly the  basal purpose of           the doctrine. That purpose is to avoid or pre vent           a detriment to the party asserting the estoppel by           compelling the  opposite party  to adhere  to  the           assumption  upon   which  the   former  acted   or           abstained from  acting. This  means that  the real           detriment or harm from which the law seeks to give           protection is  that  which  would  flow  from  the           change of position if the assumption were deserted           that led  to it.  So long  as  the  assumption  is           adhered to,  the party  who altered  his situation           upon  the   faith  of   it  cannot  complain.  His           complaint is  that when afterwards the other party           makes a different state of affairs the basis of an           assertion of  right against  him then,  if  it  is           allowed, his  own original change of position will           operate as  a detriment.  His action  or  inaction           must be  such that if the assumption upon which he           proceeded  were   shown  to   be  wrong,   and  an           inconsistent state of affairs were accepted as the           foundation of the rights and duties of himself and           the opposite  party, the  consequence would  be to           make his  original act  or failure to act a source           of prejudice."      This passage  was referred  to, with  approval, by Lord Denning in  Central Newbury  Car Auction Ltd v Unity Finance Ltd, [1956] 3 All E.R. 905 at 909. The said passage has also been quoted, with approval, 395      by Bhagwati,  J. (as  he then  was) in Motilal Padampat

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Sugar Mills Co A Ltd v state of U.P. & Ors.,[ 1979]2 SCR 641 at p. 695= 1979(2)SCC 409. The learned Judge then said:           "We do  not think  that in  order  to  invoke  the           doctrine of  promissory estoppel  it is  necessary           for  the   promisee  to   show  that  he  suffered           detriment as a result of acting in reliance on the           promise. But  we may  make it  clear  that  if  by           detriment we  mean injustice to the promisee which           could result  if the  promisor were to recede from           his promise then detriment would certainly come in           as a necessary ingredient. The detriment in such a           case  is   not  some  prejudice  suffered  by  the           promisee  by   acting  on  the  promise,  but  the           prejudice which  would be  caused to the promisee,           if the  promisor were  allowed to  go back  on the           promise. "      The view  taken in  Motilal Padmapat  Sugar Mills  case (supra) has  been reiterated  in Union  of India  & Ors.  v. Godfrey Philips  India Ltd,,  [ 1985  ] 4 SCC 369 = [ 1985 ] Supp 3 SCR 123 .      The concept  of detriment  as  we  know  understand  is whether it  appears unjust, unreasonable or inequitable that the promisor  should be allowed to resile from his assurance or representation,  having regard  to what  the promisee has done or refrained from doing in reliance on the assurance or representation.      It is,  however, quite fundamental that the doctrine of promissory estoppel,  cannot be  used to  compel the  public bodies or  the Government to carry out the representation or promise which  is contrary  to law or which is outside their authority  or  power.  Secondly,  the  estoppel  stems  from equitable doctrine.  It, therefore,  requires  that  he  who seeks  equity  must  do  equity.  The  doctrine,  therefore, cannot, also  be invoked if it is found to be inequitable or unjust in its enforcement.      We may  also state that for the purpose of invoking the doctrine, it  is not  necessary for the company to show that the assurance  contained in Ex.C5 was mainly responsible for establishing the  factory at  Kota.  There  may  be  several representations to  one party  from different authorities in regard to  different  matters.  Or,  there  may  be  several representations from  the same  party in regard to different matters.  As   in  the   instant   case,   there   was   one representation by  the Rajasthan  Government to supply power to the  company at  concessional  rate.  There  was  another representation from the same Govern- 396 ment to  exempt the  company from payment of tax for certain period. There  may be other representations from the same or some other  authorities. If  those representations have been relied upon  by the  company, the  Court would  compel those parties to adhere to their respective representations. It is immaterial whether  each of  the representations  was wholly responsible or  partly responsible  for locating the factory at Kota.  It is sufficient if the company was induced to act on that representation.      The last  and final  aspect  of  the  matter  to  which attention should be drawn is that for the purpose of finding whether an estoppel arises in favour of the person acting on the representation,  it is  necessary to look into the whole of the  representation made.  It is  also necessary to state that the  representation must  be clear  and unambiguous and not tentative  or uncertain. In this context we may usefully refer to  the following  passage  from  Halsbury’s  Laws  of England, Halsbury’s Laws of England 4th Edn. Vol. 16 p. 1071

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para 1595.           "1595. Representation must be unambiguous To found           an estoppel  a representation  must be  clear  and           unambiguous, not  necessarily susceptible  of only           one interpretation, but such as will reasonably be           understood by the person to whom it is made in the           sense contended  for, and  for  this  purpose  the           whole of  the representation  must be  looked  at.           This is  merely an  application of  the old  maxim           applicable to  all estoppels,  that they  "must be           certain to every intent      The question  now is whether the assurance given by the Railway Board in the letter Ex.C5 was clear and unqualified. But unfortunately, it is not so. It was subject to review to be  undertaken  when  the  company  starts  moving  the  raw material. Ex. C5 reads:-                                                 New Delhi I,                                           Dated S Nov., 1966           Dear Sir,                Sub: Integrated  Fertilizer-PVC   project  at      Kota, Rajasthan Rail movement of Naptha. 397                Ref: Your   letter   No.   SFC/Gen-72   dated      5.9.1966                I am directed to state that the Railway Board           agree to  quote a special rate equal o class 85-B           (Special) CC:  K for  transport of Naptha in train           loads  from   Bombay  or   Koyali  to   Kota,  for           manufacture of  fertilizers. The  proposed special           rate will apply at owner’s risk.                Since the  special rate is being quoted ahead           of the  actual setting  up of the factory the rate           may need  to be reviewed when the traffic actually           begins to  move. The  Railway may  accordingly  be           approached  before  the  traffic  actually  starts           moving.                                                        Yours faithfully,                                             Sd/- R.L. Sharma                                                for Secretary                                               Railway Board"      What does  this letter  mean? The  first  part  of  the letter offering  the concessional  rate equal  to class 85-B (Special) has  been completely  watered down  in the  second part of  the letter.  It has  been expressly stated that the rate may  need be  reviewed when the traffic actually begins to move.  The company was put to notice that it has to again approach the Railway Administration. The Railway authorities now states  that they  have reviewed  the whole  matter  and found no  justification to offer a concessional freight rate for Naptha,  since fertilizers  are deliberately given a low classification in  the tariff.  From the  tenor of Ex. S the Railways are entitled to state so, and it does not amount to resiling from the earlier assurance. No question of estoppel arises in favour of appellant out of the representation made in Ex. CS.      We,  therefore,   agree  with  the  conclusion  of  the Tribunal but not for all the reasons stated.      In the result the appeal fails and is dismissed. In the circumstances. however, we make no order as to costs. S.L.                                       Appeal dismissed. 398