Section 14
SEC. 14. The grantee shall not sell, lease, donate, convey, or give in usufruct this franchise and any property and rights acquired thereunder to any person or corporation without previous authorization by the Philippine Legislature: Provided, That for the purpose of such sale, lease, donation, conveyance or giving in usufruct, it shall be necessary to file in the office of the Secretary of Commerce and Communications an agreement in writing by which the person or corporation in whose favor such sale, lease, donation, conveyance or giving in usufruct is made, shall bind himself to comply with ; II the terms and conditions imposed upon the grantee by ;his franchise, and to accept the same subject to all existing terms and conditions.