Upon application to the director of parks and open space by a telephone, telegraph, electric power or public service corporation or utility to trim trees or perform other operations affecting public trees or shrubs, including the activities otherwise prescribed in section 142-34, or upon application of qualified contractors who have entered into contracts with a telephone, telegraph, electric power or other public service corporation or utility to trim trees or perform other operations affecting public trees or shrubs, the director shall grant a blanket permit, good until revoked for cause, covering all tree trimming and other operations affecting public trees or shrubs by such telephone, telegraph, electric power or other public service corporation or utility or qualified contractor. The director shall be notified of when and where such operations will take place. The amount of such trimming or extent of the other operations shall be done in a neat, workmanlike manner, and according to generally accepted practices. If necessary, the director may assign an inspector to supervise the provisions of the permit and the cost of such service shall be charged to the public service corporation or utility or contractor at cost. (Code 1979, § 29-43; Ord. No. 95-53, exhibit A (§ 29-43), 9-11-1995)