(3) which is used at any time after the one-year period beginning on the effective date of such regulations for activities pursuant to this Act, be manned or crewed, except as provided in subsection (c), by citizens of the United States or aliens lawfully admitted to the United States for permanent residence. (b) The regulations issued under subsection (a) (2) of this section shall not apply to any vessel, rig, platform, or other vehicle or structure built prior to the date of enactment of this section, until such time after such date as such vehicle or structure is rebuilt. (c) The regulations issued under subsection (a) (3) of this section shall not apply (1) to any vessel, rig, platform, or other vehicle or structure if (A) specific contractual provisions or national registry manning requirements in effect on the date of enactment of this section provide to the contrary; (B) there are not a sufficient number of citizens of the United States, or aliens lawfully admitted to the United States for permanent residence, qualified and available for such work; or (C) the President makes a specific finding, with respect to the particular vessel, rig, platform, or other vehicle or structure, that application would not be consistent with the national interest; and (2) to any vessel, rig, platform, or other vehicle or structure, over 50 percent of which is owned by citizens of a foreign nation or with respect to which the citizens of a foreign nation have the right effectively to control, except to the extent and to the degree that the President determines that the government of such foreign nation or any of its political subdivisions has implemented, by statute, regulation, policy, or practice, a national manning requirement for equipment engaged in the exploration, development, or production of oil and gas in its offshore areas. |