California Code, Public Resources Code - PRC § 33804

(a) An assessment to finance capital improvements and land acquisition, which may be levied within one or more zones within the conservancy's territory established to reflect the level of service provided by the conservancy within the zone, as provided in the Improvement Act of 1911 (Division 7 (commencing with Section 5000), Streets and Highways Code), the Improvement Bond Act of 1915 (Division 10 (commencing with Section 8500), Streets and Highways Code), the Municipal Improvement Act of 1913 (Division 12 (commencing with Section 10000), Streets and Highways Code), and the Landscaping and Lighting Act of 1972 (Division 15 (commencing with Section 22500), Streets and Highways Code).  At the election authorizing the assessment, the conservancy may propose a range of assessment rates, within which range the rate may from time to time be adjusted by the governing board to reflect the conservancy's revenue needs.

(b) A special tax, as provided in Article 3.7 (commencing with Section 53720) of Chapter 4 of Part 1 of Division 2 of Title 5 of the Government Code.

(c) A special tax levied pursuant to the Mello-Roos Community Facilities Act of 1982 (Chapter 2.5 (commencing with Section 53311) of Part 1 of Division 2 of Title 5 of the Government Code).