Vessels operated by general agents of United States
Notwithstanding the provisions of subsection (c)(6), service performed by officers and members of the crew of a vessel which would otherwise be included as employment under subsection (c) shall not be excluded by reason of the fact that it is performed on or in connection with an American vessel—
(1)
(1)#
owned by or bareboat chartered to the United States and
(2)#
whose business is conducted by a general agent of the Secretary of Transportation.