((a)) ** .—** Except as provided in this section or , a foreign vessel may not, under penalty of forfeiture, engage in salvaging operations on the Atlantic or Pacific coast of the United States, in any portion of the Great Lakes or their connecting or tributary waters, including any portion of the Saint Lawrence River through which the international boundary line extends, or in territorial waters of the United States on the Gulf of Mexico.
((b)) ** .—** The Secretary of Homeland Security may authorize a foreign vessel to engage in salvaging operations in a particular locality if, on investigation, the Secretary is satisfied that there is not available in that locality a suitable vessel that is—
((1)) owned only by citizens of the United States (including a Bowaters corporation under ); and
((2)) documented under chapter 121 of this title or numbered under chapter 123 of this title.
((c)) ** .—** This section does not prohibit or restrict assistance to vessels or salvaging operations authorized by treaty, including—
((1)) article II of the Treaty between the United States and Great Britain concerning reciprocal rights for United States and Canada in the conveyance of prisoners and wrecking and salvage, signed at Washington, (); or
((2)) the Treaty between the United States of America and Mexico to facilitate assistance to and salvage of vessels in territorial waters, signed at Mexico City, ().