19 CFR § 10.3017 - Accumulation.
§ 10.3017 Accumulation.
(a) Originating materials from the territory of a Party that are used in the production of a good in the territory of another Party will be considered to originate in the territory of that other Party.
(b) A good that is produced in the territory of one or both of the Parties by one or more producers is an originating good if the good satisfies the requirements of § 10.3014 and all other applicable requirements of General Note 34, HTSUS.