vested

adjective | \ ˈves-təd \ | vest·ed
  1. : fully and absolutely established as a right, benefit, or privilege : not dependent on any contingency or condition; specifically : not subject to forfeiture if employment terminates before retirement vested pension benefits : not subject to forfeiture if employment terminates before retirement vested pension benefits

  1. : having a vested interest a vested employee a vested beneficiary