Subdivision (a) of Section 31615 does not apply to the sale, delivery, or transfer of unloaded firearms to a wholesaler as merchandise in the wholesaler’s business by a manufacturer or importer licensed to engage in that business pursuant to Chapter 44 (commencing with Section 921) of Title 18 of the United States Code and the regulations issued pursuant thereto, or by another wholesaler, if the sale, delivery, or transfer is made in accordance with Chapter 44 (commencing with Section 921) of Title 18 of the United States Code.