Cal. Gov't Code § 56036.6

(a) For the purposes of Chapter 1 (commencing with Section 57000) to Chapter 7 (commencing with Section 57176), inclusive, of Part 4 or Part 5 (commencing with Section 57300), none of the following entities is a “district” or “special district” if the commission of the principal county determines, in accordance with Sections 56127 and 56128, that the entity is not a “district” or “special district”:
1. (1) A flood control district.
2. (2) A flood control and floodwater conservation district.
3. (3) A flood control and water conservation district.
4. (4) A conservation district.
5. (5) A water conservation district.
6. (6) A water replenishment district.
7. (7) The Orange County Water District.
8. (8) A California water storage district.
9. (9) A water agency.
10. (10) A county water authority or a water authority.
(b) If the commission determines that an entity described in this section is not a “district” or “special district,” any proceedings pursuant to Part 4 (commencing with Section 57000) for a change of organization involving the entity shall be conducted pursuant to the principal act authorizing the establishment of that entity.