California Code, Streets and Highways Code - SHC § 25075

Within 10 days after the receipt of the certificate of organization of the district, the clerk of the initiatory board of supervisors shall notify the persons selected to serve as members of the board of directors of the district of the time and place at which the first meeting of the board shall be held.  The clerk may select the place and fix any time within 30 days after the date of mailing notices for the holding of the first meeting.