50 CFR §80.67

A grant-funded project or facility is multipurpose if it carries out the purposes of: In accordance with 2 CFR 200.405, a State fish and wildlife agency must allocate costs in multipurpose projects based on eligible activities authorized, sources of funding, and the uses or benefits for each purpose that will result from the completed project or facility. The agency must describe the method used to allocate costs in multipurpose projects or facilities in the project statement included in the award application.

(1) A single grant program under the Acts; and

(2) Another grant program, subprogram, a different funding source under the Acts, a grant program not under the Acts, or an activity unrelated to awards.