; or (B) represented that any product used in projects to which this section applies, sold in or shipped to the United States that was not produced in the United States, was produced in the United States; that person shall be debarred from contracting with the Federal Government for a period of not less than 5 years. . (b) Clerical amendment The table of sections at the beginning of such chapter is amended by adding after the item relating to section 4712 the following new item: 4713. Domestic sourcing requirement for shipboard components. . 4. Conforming amendments related to Department of Defense provisions (a) Use of United States steel, iron, aluminum, and manufactured products (1) In general Chapter 137 of title 10, United States Code, is amended by adding at the end the following new section: 2339a. Use of United States steel, iron, aluminum, and manufactured products in shipbuilding (a) In general The head of an agency may not enter into a contract related to the construction of a vessel unless the steel, iron, aluminum, and manufactured products to be used in the construction of the vessel are produced in the United States. (b) Exceptions The provisions of subsection (a) shall not apply where the head of the agency finds— (1) that their application would be inconsistent with the public interest; (2) that such materials and products are not produced in the United States in sufficient and reasonably available quantities and of a satisfactory quality