The city of Sacramento, and its officers, employees, and agents when acting in the course and scope of their employment, shall be exempt from the provisions of this article; provided, however, that the city manager shall promulgate administrative regulations governing water use by the city, and its officers, employees, and agents, as may be necessary for the city to achieve the conservation of water resources equal to or greater than the level of conservation achieved by the city's water service customers. (Ord. 2009-050 § 1; Ord. 2009-026 § 1)