19 CFR §10.763
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
An importer may make a claim for MFTA preferential tariff treatment for an originating good by including on the entry summary, or equivalent documentation, the symbol “MA” as a prefix to the subheading of the HTSUS under which each qualifying good is classified, or by the method specified for equivalent reporting via an authorized electronic data interchange system.