37 C.F.R. § 2.153
The owner of a mark registered under the provisions of the Trademark Act of 1881 or 1905 may at any time prior to the expiration of the period for which the registration was issued or renewed, upon the payment of the prescribed fee, file an affidavit or declaration in accordance with § 2.20 setting forth those goods or services in the registration on or in connection with which said mark is in use in commerce, and stating that the owner claims the benefits of the Act of 1946. The affidavit or declaration must be signed by a person properly authorized to sign on behalf of the owner under § 2.193(e)(1) .
37 C.F.R. §2.153
Part 3 pertaining to both patents and trademarks is placed in the grouping pertaining to patents regulations.
Part 4 is placed in the separate grouping of parts pertaining to patents regulations.
Part 5 is placed in the separate grouping of parts pertaining to patents regulations.