Section 16
SEC. 16. The grantee may install, maintain, operate, purchase or lease such telephone stations, lines, cables or system as is, or are, convenient or essential to efficiently carry out the purpose of this franchise: Provided, however, That the grantee, its successors or assigns, shall not, without permission of the Public Service Commission first had, install, maintain, operate, purchase or lease such stations, lines, cables or system.