Whenever said City does acquire any gas plant, gas distribution system, business, and goodwill (hereinafter referred to as the gas business) in accordance with the foregoing sections, such gas business shall be operated and maintained as a separate unit with separate accounting insofar as practicable, and shall be controlled, managed, operated, and maintained by the Light Department and the officers thereof as part of that Department, and all provisions of the City charter relating to the operation and maintenance of the Light Department and the duties of the officers thereof and not inconsistent with any section of this article shall apply to such gas business.