California Code, Water Code - WAT § 1675

(a) If, at any time after a license is issued, the board finds that the licensee has not put the water granted under the license to a useful or beneficial purpose in conformity with this division or that the licensee has ceased to put the water to that useful or beneficial purpose, or that the licensee has failed to observe any of the terms and conditions in the license, the board may revoke the license and declare the water to be subject to appropriation in accordance with this part.

(b) The board may revoke the license upon request of the licensee or after due notice to the licensee and after a hearing, when a hearing is requested by the licensee pursuant to Section 1675.1.

(c) As used in this section “licensee” includes the heirs, successors, or assigns of the licensee.