California Code, Water Code - WAT § 75601

(a) Notwithstanding any other provision of law, the board may amend the report prepared pursuant to Section 75561 at any time during the water year.  Upon completion of any amended report, the board shall deliver the report to the secretary.

(b) The secretary shall publish a notice of the receipt of the amended report and of a public hearing.  The notice shall be published pursuant to Section 75571.

(c) The board shall hold a public hearing within 30 days after the receipt of the amended report.  Persons may appear and submit evidence at the public hearing concerning the groundwater conditions and the surface water supplies of the district.  Any person may protest or support the amended report.

(d) The board may modify a groundwater charge levied pursuant to Section 75591 if, in the judgment of the board, based on the findings and determinations from the hearing held pursuant to subdivision (c), the modification is necessary.

(e) Any groundwater charge modified pursuant to subdivision (d) is subject to Sections 75592, 75593, 75594, 75595, and 75596.

(f) Upon the modification of the groundwater charge pursuant to subdivision (d), the board shall notify, in writing, the board of supervisors and the auditor of each county of the modification.