Cal. Health & Saf. Code § 4808
At the time and place so fixed, or at any time and place to which the hearing is adjourned, the district board shall proceed with the hearing. At the hearing any person interested, including any person owning property within the district or within the proposed improvement district, may appear and protest the inclusion of his property within the proposed improvement district and/or present any other matters material to the questions set forth in the resolution declaring the necessity for incurring the bonded indebtedness.
The district board shall have power to change the purpose for which the proposed debt is to be incurred, or the amount of bonded debt to be incurred, or the boundaries of said proposed improvement district, or one or all of said matters; provided, however, that said board shall not change such boundaries so as to include any territory which will not, in its judgment, be benefited by said improvement; and provided further, that said board shall exclude from the proposed improvement district any territory which it finds will not be benefited by inclusion therein. If the district board proposes to change the purposes for which the proposed debt is to be incurred, it shall cause appropriate changes to be made in the report before giving notice of such change. The purpose, amount of bonded debt and boundaries shall not be changed by said board except after notice of its intention to do so, given pursuant to Section 6061 of the Government Code in a newspaper having general circulation in said county sanitation district, and by posting in three public places within said proposed improvement district. Said notice shall state the changed purpose and debt proposed and that the engineer's report as changed by said board, together with a map showing exterior boundaries as proposed to be changed, are on file with the district board and are available for inspection by any person interested, and specify the time and place for hearing on such change, which time shall be at least 10 days after publication or posting of said notice. At the time and place so fixed, or at any time and place to which the hearing is adjourned, said board shall continue with the hearing. At the hearing any person interested, including any person owning property within the district or the proposed improvement district, may appear and present any matters material to the changes stated in the notice.
At the conclusion of the hearing the board shall by resolution determine whether it is deemed necessary to incur the bonded indebtedness, and, if so, the resolution shall also state the purpose for which said proposed debt is to be incurred (which purpose shall not include the acquisition or construction of new local street sewers or laterals as distinguished from main trunk, interceptor and outfall sewers) the amount of the proposed debt, that the exterior boundaries of the portion of the district which will be benefited are set forth on a map on file with the district board, which map shall govern for all details as to the extent of the improvement district, and that said portion of the district set forth on said map shall thereupon constitute and be known as "Improvement District No. __ of ____ (name of county sanitation district)," and the determination made in said resolution shall be final and conclusive. After the formation of such improvement district within a county sanitation district, all proceedings for the purpose of a bond election shall be limited and shall apply only to the improvement district, and taxes for the payment of said bonds and the interest thereon shall be derived exclusively from an annual tax upon the real property in the improvement district.
Ca. Health and Saf. Code § 4808