10 U.S.C. § 2245a
Funds appropriated to the Department of Defense for operation and maintenance may not be used to purchase any item (including any item to be acquired as a replacement for an item) that has an investment item unit cost that is greater than $250,000.
(Added Pub. L. 109–163, div. A, title III, § 373(a), , 119 Stat. 3210.)