-39(2) such additional laws, rules, and regulations as the Governor determines to be applicable to conditions existing in the Canal Zone, (b) The Governor may prescribe regulations necessary for the maintenance and operation of the Canal Zone postal service. § 1132. Maintenance and operation of postal service (a) The Governor shall: (1) maintain and operate a postal service in the Canal Zoiie, includhig a money-order system, a parcel-post system, a postalsaving system, and other services necessary or convenient in connection with the postal service; (2) establish and discontinue post offices; (3) except as provided by subsection (b) of this section, prescribe the postage rates; and (4) prescribe the postage stamps and other stamped paper which shall be used in the service. (b) Domestic postage rates in the United States are applicable in the Canal Zone to regular mail exchanged with the United States. § 1133. Acceptance of postal-savings deposits Under regulations prescribed by the Governor, post offices in the Canal Zone designated by him may receive postal-savings deposits, and issue therefor postal-savings certificates in the form prescribed by him. § 1134. Rate of interest on postal-savings certificates Postal-savings certificates issued as provided by this chapter shall bear interest at such rate, not exceeding 3 percent per annum, as shall be established by the President. § 1135. Faith of United States pledged to payment of deposits The faith of the United States is pledged to the payment of postalsavings certificates issued as provided by this chapter, with accrued interest thereon, in the same manner as such faith is pledged by law with respect to deposits made in postal-savings depository offices in the United States. § 1136. Control of money-order and postal-savings fees The Governor shall control the funds, exclusive of fees, received from the issuance of money orders and postal-savings certificates by the Canal Zone postal service. § 1137. Deposit of money-order and postal-savings funds in the United States Treasury The Governor may cause to be deposited in the United States Treasury for safekeeping, but subject to his control, any of the funds, excluding interest and fees therefrom, received from the issuance of money orders and postal-savings certificates. Under regulations prescribed by the Governor, the funds so deposited may be withdrawn from time to time. § 1138. Deposit of money-order and postal-savings funds in banks; security The Secretary of the Treasury shall designate one or more nationalbanking associations to be depositories, under regulations prescribed by him, of funds received from the issuance of money orders and postal-savings certificates, excluding interest and fees therefrom, and shall require the associations thus designated to give satisfactory security, by the deposit of United States bonds or otherwise, for the safekeeping and prompt payment of the funds deposited with them. The associations shall give the security required.