Merriam-Webster Collegiate Dictionary - requisition

 noun  Etymology: Middle English requisicion, from Middle French or Medieval Latin; Middle French ~, from Medieval Latin ~-, requisitio, from Latin, act of searching, from requirere  Date: 15th century  1.  a. the act of formally requiring or calling upon someone to perform an action  b. a formal demand made by one nation upon another for the surrender or extradition of a fugitive from justice  2.  a. the act of requiring something to be furnished  b. a demand or application made usually with authority: as  (1) a demand made by military authorities upon civilians for supplies or other needs  (2) a written request for something authorized but not made available automatically  3. the state of being in demand or use  • ~ transitive verb