Article 1. Creation Of Regional Districts of California Health And Safety Code >> Division 26. >> Part 3. >> Chapter 5. >> Article 1.

(a) The boards of supervisors of two or more counties within an air basin may hold a public hearing to determine whether the counties under their jurisdiction should become part of a regional district.
  (b) Such boards of supervisors shall hold a public hearing to resolve such a question, if a petition is submitted to each such board of supervisors. A petition submitted to a board of supervisors shall be signed by not less than 10 percent of the qualified electors of the county under its jurisdiction.

Prior to the public hearing, the board of supervisors shall give, not less than 15 days nor more than 45 days before the hearing, notice of the time and place of the hearing by publication pursuant to Section 6061 of the Government Code.

Upon conclusion of the public hearing, the board of supervisors may adopt a resolution declaring that there is need for a regional district to function in the county, or portion thereof, if, from the evidence received at such hearing, it finds that it is in the best interests of the county that a regional district function therein.

Upon adoption of a resolution pursuant to Section 40302, the board of supervisors shall file a certified copy of the resolution with the state board.

From and after the date of the filing of certified copies of resolutions from two or more boards of supervisors desiring to create a regional district, the regional district shall begin to function and may exercise its powers.