California Code, Government Code - GOV § 54986

(a) Prior to either approving an increase in an existing fee or charge or initially imposing a new fee or charge pursuant to Section 54985, the board of supervisors shall hold at least one public meeting, at which oral or written presentations may be made, as part of a regularly scheduled meeting. Notice of the time and place of the meeting, including a general explanation of the matter to be considered, and a statement that the data required by this section is available, shall be mailed at least 14 days prior to the meeting to any interested party who files a written request with the clerk of the board of supervisors for mailed notice of the meeting on new or increased fees or charges. Any written request for such mailed notices shall be valid for one year from the date on which it is filed unless a renewal request is filed. Renewal requests for such mailed notices shall be filed on or before April 1st of each year. The board of supervisors may establish a reasonable annual charge for sending those notices based on the estimated cost of providing that service. At least 10 days prior to the meeting, the board of supervisors shall make available to the public data indicating the amount of cost, or estimated cost, required to provide the product or service or the cost of enforcing any regulation for which the fee or charge is levied and the revenue sources anticipated to provide the product or service or the cost of enforcing any regulation, including general fund revenues.

(b) Any action by a board of supervisors to levy a new fee or charge or to approve an increase in an existing fee or charge pursuant to Section 54985 shall be taken only by ordinance.

(c) Any costs incurred by a county, a county service area, or county waterworks district governed by a county board of supervisors in conducting the meeting or meetings required pursuant to subdivision (a) may be recovered from fees charged for the product or service or the cost of enforcing any regulation which were the subject of the meeting.