Pub. L. 102-389, tit. V, sec. 507

Sec. 507. None of the funds provided in this Act may be used for payment, through grants or contracts, to recipients that do not snare in the cost of conducting research resulting from proposals not specifically solicited by the Government: Provided, That the extent of cost sharing by the recipient shall reflect the mutuality of interest of the grantee or contractor and the Government in the research.