California Code, Water Code - WAT § 2526

(a) The facts of the entry of the order and of the pendency of the proceedings;

(b) That all claimants to rights to the use of water of the stream system are required to inform the board within 60 days from the date of the notice, or such further time as the board may allow, of their intention to file proof of claim;

(c) The date prior to which all claimants to rights to the water of the stream system shall notify the board in writing of their intention to file proof of claim and the address to which all subsequent notices to the claimant relating to the proceedings may be sent;

(d) A statement that all claimants will be required to make proof of their claims at a time to be fixed by the board after the conclusion of its investigation.