((a)) ** .—** Except as provided in subsection (b), the authority granted to the Secretary under sections 70001, 70002, 70003, 70004, and 70011 may not be delegated with respect to the Saint Lawrence Seaway to any agency other than the Great Lakes St. Lawrence Seaway Development Corporation. Any other authority granted the Secretary under subchapters I through III and this subchapter shall be delegated by the Secretary to the Great Lakes St. Lawrence Seaway Development Corporation to the extent the Secretary determines such delegation is necessary for the proper operation of the Saint Lawrence Seaway.

((b)) ** .—** The Secretary of the department in which the Coast Guard is operating, after consultation with the Secretary or the head of an agency to which the Secretary has delegated the authorities in subsection (a), may—

((1)) issue and enforce special orders in accordance with section 70002;

((2)) establish water or waterfront safety zones, or other measures, for limited, controlled, or conditional access and activity when necessary for the protection of any vessel structure, waters, or shore area, as permitted in section 70011(b)(3); and

((3)) take actions for port, harbor, and coastal facility security in accordance with section 70116.