100. Pole line and aerial wire extensions necessary to furnish telephone service shall be made by the company in accordance with the tariff schedules. Any contribution in aid of construction shall be computed in accordance with the regulations set forth in the tariff schedules, and the payment of such charges gives the subscriber no ownership or control of the extension.105. The company may permit the subscriber to furnish and set necessary poles in accordance with the construction standards of the company in lieu of part or all of the above pole line extension charges but in all such cases, ownership of the extension shall be vested in the company.110. Contracts for the telephone service where a line extension at filed charges is necessary may be required by the company as a condition incident to the establishment of service, for a period not to exceed five (5) years. In lieu of, or in addition to the contract as set out above, the company may require advance payment of the first year's local exchange rental as a prerequisite to the construction of an extension into a new rural area.115. All line extensions referred to in Sections 100, 105, and 110 above shall be owned and maintained by the company.120. The routing of line extensions shall be determined by the company except when modified under the provisions of Section 125 below.125. A departure from any of the above may not be made without prior approval by the Commission.