A distribution made by the Office of Management and Budget (OMB) of amounts available for obligation in an appropriation or fund accounts of the Executive Branch. The distribution makes amounts available on the basis off specified time periods, programs, activities, projects, objects, or any combinations of these. The apportionment system is intended to achieve an effective and orderly use of funds, and the apportioned amount limits the obligations that may be incurred. An apportionment may be further subdivided by an agency into allocations, sub-allocations, allotments, and suballotments.
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