The President may withhold or revoke such license when he shall be satisfied after due notice and hearing that such action will assist in securing rights for the landing or operation of cables in foreign countries, or in maintaining the rights or interests of the United States or of its citizens in foreign countries, or will promote the security of the United States, or may grant such license upon such terms as shall be necessary to assure just and reasonable rates and service in the operation and use of cables so licensed. The license shall not contain terms or conditions granting to the licensee exclusive rights of landing or of operation in the United States. Nothing herein contained shall be construed to limit the power and jurisdiction of the Federal Communications Commission with respect to the transmission of messages.