Section 15. Sale, Lease, Transfer, Usufruct, Etc. – The grantee shall not lease, transfer, grant the usufruct of, sell nor assign this franchise or the rights and privileges acquired thereunder to any person, firm, company, corporation or other commercial or legal entity, nor merge with any corporation or entity, nor shall the controlling interest of the grantee be transferred, whether as a whole or in parts and whether simultaneously or contemporaneously, to any such person, firm, company, corporation or entity without the prior approval of the Congress of the Philippines. Any person or entity to which this franchise is sold, transferred or assigned, shall be subject to the same conditions, terms, restrictions, and limitations of this Act.