16 USC 590c - Conditions under which benefits of law extended to nongovernment controlled lands

As a condition to the extending of any benefits under this chapter to any lands not owned or controlled by the United States or any of its agencies, the Secretary of Agriculture may, insofar as he may deem necessary for the purposes of this chapter, require
(1) The enactment and reasonable safeguards for the enforcement of State and local laws imposing suitable permanent restrictions on the use of such lands and otherwise providing for the prevention of soil erosion;
(2) Agreements or covenants as to the permanent use of such lands; and
(3) Contributions in money, services, materials, or otherwise, to any operations conferring such benefits.