California Code, Health and Safety Code - HSC § 4878

If the board overrules the objections to the formation it shall hear any person objecting to the inclusion in the proposed district of any particular territory and may, upon the hearing, exclude any territory that would not be benefited by inclusion. At the conclusion of the hearing the board may by resolution abandon the proposed formation of the district, or it may form the district and fix its boundaries either as set forth in the notice or as modified upon the hearing. The boundaries shall not be changed to include any territory outside the boundaries described in the notice.