Section 40151 Of Chapter 3. Unified Air Pollution Control Districts From California Health And Safety Code >> Division 26. >> Part 3. >> Chapter 3.

. The board of supervisors of any county may, by a vote of its members, appoint two of its members to meet with an equal number appointed in a like manner from other counties and agree to form a unified district, which agreement, upon ratification by the boards of supervisors, shall create a unified district out of the county districts under their jurisdiction.