19 CFR 133.4: Effective date, term, and cancellation of trademark recordation and renewals.

(a) Effective date. Recordation of trademark and protection thereunder shall be effective on the date an application for recordation is approved, as shown on the recordation notice issued by the U.S. Customs and Border Protection instructing U.S. Customs and Border Protection Officers as to the terms and conditions of import protection appropriate.

(b) Term. The recordation or renewal of an existing recordation of a trademark shall remain in force concurrently with the 20-year current registration period or last renewal thereof in the U.S. Patent and Trademark Office.

(c) Cancellation of recordation. Recordation of a trademark with the U.S. Customs and Border Protection shall be canceled if the trademark registration is finally canceled or revoked.