Cal. Wat. Code § 12006
Any person, for the purpose of performing the obligations of any contract entered into by such person under the provisions of this part, or for the purpose of obtaining any of the rights, benefits or privileges or assuming and performing any of the obligations or duties created or contemplated by the contracts referred to in this part, and either through the agency of or in co-operation with any other person or public entity or agency, may contract with any other person, or the United States, or the State of California, or any public corporation or agency, in relation thereto, including, but not by way of limitation, the financing thereof, or any other matter of performance thereof, or any other matter incident thereto.
Ca. Water Code § 12006