50 C.F.R. § 27.93 : Wildlife and Fisheries — UNITED STATES FISH AND WILDLIFE SERVICE, DEPARTMENT OF THE INTERIOR — THE NATIONAL WILDLIFE REFUGE SYSTEM — PROHIBITED ACTS — OTHER DISTURBING VIOLATIONS — Abandonment of property

Abandoning, discarding, or otherwise leaving any personal property in any national wildlife refuge is prohibited.

50 C.F.R. §27.93