California Code, Government Code - GOV § 23252

(a) The commission shall cause written notice of the hearing to be given to each of the chief petitioners, if any.

(b) Where the territory proposed to be transferred is uninhabited, the commission shall cause written notice of the hearing to be mailed to each person to whom land within the territory proposed to be transferred is assessed in the last equalized county assessment roll available on the date the proceedings were initiated, at the address shown on the assessment roll or as known to the commission, and to any persons who have filed their name and address and the designation of the lands in which they have any interest, either legal or equitable, with the commission.

(c) In the event any land within the territory proposed to be transferred is tide or submerged land owned by the state, the commission shall also cause written notice of the hearing to be mailed to the State Lands Commission. Such notice shall be given not less than 45 days before the time fixed for hearing.

The notices referred to in subdivisions (a) and (b) shall be given not less than 20 days before the time fixed for hearing; provided, that the notice referred to in subdivision (b) need not be sent if the owner or owners of all of the territory to be transferred have petitioned for the county boundary change or filed their consent to the boundary change in writing with the commission.