7 U.S.C. § 2272a

On and after August 6, 1996 , funds appropriated to the Department of Agriculture may be used for incidental expenses such as transportation, uniforms, lodging, and subsistence for volunteers serving under the authority of section 2272 of this title , when such volunteers are engaged in the work of the United States Department of Agriculture; and for promotional items of nominal value relating to the United States Department of Agriculture Volunteer Programs.