19 CFR §182.14

1. (a)General. Except as otherwise provided in paragraph (b) of this section, an importer will not be required to submit a copy of a certification of origin under § 182.12 for:
   1. (1)A non-commercial importation of a good; or
   2. (2)A commercial importation for which the value of the originating goods does not exceed $2,500 in U.S. dollars.
2. (b)Exception. If CBP determines that an importation described in paragraph (a) of this section is part of a series of importations carried out or planned for the purpose of evading compliance with the certification requirements of § 182.12, CBP will notify the importer that for that importation the importer must submit to CBP a copy of the certification of origin. The importer must submit such a copy within 30 days from the date of the notice. Failure to timely submit a copy of the certification of origin will result in denial of the claim for preferential tariff treatment.