36 CFR § 331.21 - Unauthorized structures.
---
identifier: "/us/cfr/t36/s331.21"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "36 CFR § 331.21 - Unauthorized structures."
title_number: 36
title_name: "Parks, Forests, and Public Property"
section_number: "331.21"
section_name: "Unauthorized structures."
chapter_name: "CORPS OF ENGINEERS, DEPARTMENT OF THE ARMY"
part_number: "331"
part_name: "REGULATIONS GOVERNING THE PROTECTION, USE AND MANAGEMENT OF THE FALLS OF THE OHIO NATIONAL WILDLIFE CONSERVATION AREA, KENTUCKY AND INDIANA"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "Pub. L. 97-137."
regulatory_source: "48 FR 40720, Sept. 9, 1983, unless otherwise noted."
cfr_part: "331"
---
# 331.21 Unauthorized structures.
The construction, placing, or continued existence of any structure of any kind under, upon, in, or over WCA lands or waters is prohibited unless a permit, lease, license, or other appropriate written agreement therefor has been issued by the District Engineer. Structures not so authorized are subject to summary removal or impoundment by the District Engineer. The design, construction, placing, existence, or use of structures in violation of the terms of the permit, lease, license, or other written agreement therefor is prohibited.