California Code, Health and Safety Code - HSC § 4730.8

(a) Notwithstanding Sections 4730, 4730.1, and 4730.2, or any other provision of law, the governing board of a sanitation district in the County of Riverside that includes no territory within a city shall be the county board of supervisors.

(b) The sanitation district may include all or a part of the territory of one or more previously existing sanitary districts that lie within the unincorporated territory of the county.

(c) If the sanitation district includes any part of a sanitary district, the sanitation district shall not perform any of the functions of the sanitary district within the boundaries of the sanitary district if the sanitary district has performed that function within the 10 years immediately preceding January 1, 1994.

(d) The sanitation district may handle, treat, and manage solid waste, as defined pursuant to the California Integrated Waste Management Act of 1989 (Division 30 (commencing with Section 40000) of the Public Resources Code), in the same manner as the County of Riverside is authorized pursuant to that act.