50 C.F.R. § 27.96 Advertising.
Title 50 - Wildlife and Fisheries
Except as may be authorized, posting, distributing, or otherwise displaying private or public notices, advertisements, announcements, or displays of any kind in any national wildlife refuge, other than business designations on private vehicles or boats is prohibited.
Title 50: Wildlife and Fisheries
PART 27—PROHIBITED ACTS
Subpart I—Other Disturbing Violations
§ 27.96 Advertising.