California Code, Water Code - WAT § 12955

Requests by any city, county, or district to have an area designated an impact area may be made at any time after the authorization of a water resources project by the Legislature. Except with respect to assistance during the first year of construction or during the first year after enactment of a law providing state aid, requests for financial assistance under provisions of this part shall be made at least six months prior to the beginning of the fiscal year for which the assistance is requested.