20 ILCS 820/1
The Department of Natural Resources is authorized for and on behalf of the State to enter into cooperative agreements with the federal government, or the proper department or agency thereof, pursuant to the provisions of an Act of Congress entitled "An Act to authorize cooperation with the several States for the purpose of stimulating the acquisition, development, and proper administration and management of State forests and coordinating Federal and State activities in carrying out a national program of forest-land management, and for other purposes", approved August 29, 1935, and known as the Fulmer Act for the management, administration, development and purchase by the Department of Natural Resources of any forest lands acquired and over which it has been given jurisdiction by such cooperative agreement.
20 ILCS 820/1