California Code, Streets and Highways Code - SHC § 35268

At the hearing the legislative body may alter the boundaries of the proposed district as it finds to be proper and advisable and shall define and establish the boundaries, but the legislative body shall not modify the boundaries so as to include any territory which will not in its judgment be benefited by the proposed project, and no territory shall be excluded from the proposed district which will in the judgment of the legislative body be benefited by the proposed project.