California Code, Water Code - WAT § 46010

If, after a project has been completed, the board determines that an additional project would be for the benefit of the entire district, the board may, in the manner provided in this chapter, levy a supplemental preliminary assessment up to an amount not in excess of two dollars and fifty cents ($2.50) per acre.  The approval of the department on an assessment levied under this section and Section 42752 shall not be required.