Cal. Wat. Code § 1015
During the term of a temporary change, as defined in Section 1725.5, if an enforcement action or other proceeding is commenced that alleges that the use of water violates Section 2 of Article X of the California Constitution, Sections 100, 101, 1410, and 1675, or any other legislative, administrative, or judicial limitation on the water that is subject to that water transfer and the water involved is, at the time of the alleged violation, subject to a water transfer, the determination of the alleged violation shall be based on an assessment of the transferee's use of transferred water. If a transferee's right to use transferred water is divested, in whole or in part, on the basis of the transferee's abandonment, forfeiture, waste, or unreasonable use of the transferred water, the divested portion of the right shall revert immediately to the transferor.
Ca. Water Code § 1015