19 C.F.R. § 10.460
An indirect material, as defined in § 10.402(o) , will be considered to be an originating material without regard to where it is produced.
Example. Chilean Producer C produces good C using non-originating material A. Producer C imports non-originating rubber gloves for use by workers in the production of good C. Good C is subject to a tariff shift requirement. As provided in § 10.451(b)(1) and General Note 26(n), each of the non-originating materials in good C must undergo the specified change in tariff classification in order for good C to be considered originating. Although non-originating material A must undergo the applicable tariff shift in order for good C to be considered originating, the rubber gloves do not because they are indirect materials and are considered originating without regard to where they are produced.
19 C.F.R. §10.460