A statute or legislation under the jurisdiction of the House and Senate Committees on Appropriations that provides budget authority. Enactment of an appropriation act generally follows adoption of an authorization. Currently, there are 13 regular appropriation acts each year; the Congress may also enact supplemental or continuing appropriations. See budget authority.
A statute, under the jurisdiction of the House and Senate Appropriations Committees, that generally provides authority for agencies to incur obligations for the acquisition of goods, services, or facilities and to make payments out of the Treasury for purposes specified in the act. The authorization usually expires at the end of a specified term, most often one year.