What is Requisition?

Legal Definition
The act of demanding a thing to be done by virtue of some right. 2. The constitution of the United States, art. 4, s. 2, provides that fugitives from justice shall be delivered up to the authorities of the state from which they are fugitives, on the demand of the executive from such state. The demand made by the governor of one state on the governor of another for a fugitive is called a requisition.
-- Bouviers Law Dictionary
Legal Definition
A demand in writing, or formal request or requirement. Bain v. State, 61 Ala. 79; Atwood v. Charlton, 21 R.I. 568, 45 Atl. 580. In international law. The formal demand by one government upon another, or by the governor' of one of the United States upon the governor of a sister state, of the surrender of a fugitive criminal. In Scotch law. A demand made by a creditor that a debt be paid or an obligation fulfilled. Bell.
-- Black's Law Dictionary
Legal Definition
A request of an executive for troops. See 19 Johns. (N. Y.) 7. An application to an executive for the final warrant for the surrender of a fugitive from justice. See 16 Fed. (U. S.) 93.
-- Ballentine's Law Dictionary