US Code
SUBCHAPTER I— VESSEL OPERATIONS
§ 70002. Special powers

(1) the Secretary has reasonable cause to believe such vessel does not comply with any regulation issued under section 70034 or any other applicable law or treaty;
(2) the Secretary determines such vessel does not satisfy the conditions for port entry set forth in section 70021 or 70022 of this title; or
(3) by reason of weather, visibility, sea conditions, port congestion, other hazardous circumstances, or the condition of such vessel, the Secretary is satisfied such direction is justified in the interest of safety.