California Code, Water Code - WAT § 1725

(a) A permittee or licensee may temporarily change the point of diversion, place of use, or purpose of use due to a transfer or exchange of water or water rights if the transfer would only involve the amount of water that would have been consumptively used or stored by the permittee or licensee in the absence of the proposed temporary change, would not injure any legal user of the water, and would not unreasonably affect fish, wildlife, or other instream beneficial uses.

(b) The provisions of this article applicable to a permittee or licensee proposing a temporary change apply to a person entitled to the use of water who proposes pursuant to this article a temporary change under Section 1707 and the temporary change shall be deemed a transfer of water or water rights.