19 CFR § 181.132 - Disassembly.
(a) Treated as production. For purposes of implementing the rules of origin provisions of General Note 12, HTSUS, and Chapter Four of the NAFTA, except as provided in paragraph (b) of this section, disassembly is considered to be production, and a component recovered from a good disassembled in the territory of a Party will be considered to be originating as the result of such disassembly provided that the recovered component satisfies all applicable requirements of Annex 401 and this part.
(b) Exception; new goods. Disassembly, as provided in paragraph (a) of this section, will not be considered production in the case of components that are recovered from new goods. For purposes of this paragraph, a “new good” means a good which is in the same condition as it was when it was manufactured and which meets the commercial standards for new goods in the relevant industry.