(Amended by Ordinance Nos. 159491, 162574 and 184957, effective November 25, 2011.) Subject to payment of the applicable fees prescribed in Chapter 7.12, if the City Engineer finds that the application and the plans, specifications and route map filed are satisfactory, the Director of the Bureau of Transportation may approve the same and issue to the applicant a permit to enter upon the designated streets, public use easements designated in Section 17.60.010 or parts thereof in an underground wiring district, to make such excavation therein, as may be necessary to construct conduits or subways, to lay wires, cables and appliances therein, and to build vaults, manholes or service boxes underground within the space theretofore designated. It is unlawful to make any excavation in any street or public use easement designated in Section 17.60.010 to install underground facilities, without a permit from the Director of the Bureau of Transportation and paying the fees set forth in Section 17.24.020. All excavation work and restoration pursuant to the permit shall be under the general supervision of the Director of the Bureau of Transportation and shall be made only after notice to the Director of the Bureau of Transportation.