California Code, Streets and Highways Code - SHC § 36541

(a) The city council shall modify the basis and method of levying the assessment or the boundaries of the area by adopting an ordinance after holding a public hearing on the proposed modification.

(b) The city council shall adopt a resolution of intention which states the proposed modification prior to the public hearing required by this section. The public hearing shall be consistent with the requirements of Section 54954.6 of the Government Code. Notice of the public hearing shall be published and shall be mailed to each owner of a business affected by the proposed modification, as provided in Section 36523. The public hearing shall be conducted as provided in Sections 36524 and 36525.