Cal. Sts. & Hy. Code § 5828.1
When the board of supervisors adopts a separate resolution declaring its intention to form a maintenance district for sanitary sewers or for street lighting, the clerk shall be directed to give notice of the hearing. The notice shall have the heading "Notice of the proposed formation of ____ Sewer (or Street Lighting) Maintenance District," stating the name of the proposed district. It shall:
In lieu of a description, the boundaries of the territory proposed to be included may be shown by means of a diagram printed upon the notice. The board shall direct the clerk to publish the notice and shall also direct the clerk to post the notice in three public places in the proposed district at least 10 days prior to the date set for the hearing. The heading of each posted notice shall be in letters not less than one inch in height. Notice by mail is not required.
Ca. Sts. and High. Code § 5828.1