Cal. Water Code § 42251

Except where it is proposed to be acquired by eminent domain proceedings, no property belonging to any water corporation which is a public utility shall be acquired by a district, nor shall any property of such public utility be included in the report of the board unless and until the Public Utilities Commission has made its order authorizing the sale and any abandonment or curtailment of service by the public utility which would result from the acquisition by the district of property of the public utility.