California Code, Government Code - GOV § 56119

It is not necessary for the principal act of any district to adopt or incorporate this division by reference and any change of organization or reorganization provided for by this division may be made by, or with respect to, any district. Except as otherwise provided in this division, in any change of organization or reorganization the principal act shall govern as to any provisions in the principal act pertaining to boundaries, to contiguity or noncontiguity of territory, to the incorporated or unincorporated status of territory, and to the overlapping of territory of a district with the territory of another district or city. Unless otherwise provided by the principal act, any territory annexed to a district shall be contiguous to the district and shall not be a part of another district formed under the same principal act without the consent of the other district.