Importers engaged in the business of selling, or offering for sale, distilled spirits, wines, or beer are subject to the provisions of part 31 of this chapter relating to dealer registration and records. Part 31 requires the filing of TTB Form 5630.5d with TTB, in accordance with the instructions on the form, before commencing business and on or before July 1 of each year thereafter if there have been any changes. The dealer must file an amended registration and give notice of termination in accordance with the rules of part 31.