22 U.S.C. § 3741 Postal service
(a) Possession or administration of funds by CommissionThe Commission shall take possession of and administer the funds of the Canal Zone postal service and shall assume its obligations.
(b) Expiration of responsibility for unpaid balancesEffective December 1, 1999, neither the Commission nor the United States Government shall be responsible for the distribution of any accumulated unpaid balances relating to Canal Zone postal-savings deposits, postal-savings certificates, and postal money orders.
(c) Mail addressed to Canal Zone from or through United StatesMail addressed to the Canal Zone from or through the continental United States may be routed by the United States Postal Service to the military post offices of the United States Armed Forces in the Republic of Panama. Such military post offices shall provide the required directory services and shall accept such mail to the extent permitted under the Panama Canal Treaty of 1977 and related agreements. The Commission shall furnish personnel, records, and other services to such military post offices to assure wherever appropriate the distribution, rerouting, or return of such mail.