Mailed notice of any proposal shall be sent first class and deposited, postage prepaid, in the United States mails and shall be deemed to have been given when so deposited. When notice is required to be given to:
(a)
A city, county or district, it shall be addressed to the clerk thereof;(b)
Persons requesting special notice, it shall be addressed to each person who has filed a written request for special notice of filings of proposals with the county surveyor.
Source:
Section 58855.5, https://leginfo.legislature.ca.gov/faces/codes_displaySection.xhtml?lawCode=GOV§ionNum=58855.5..