This division is applicable only within the boundaries of the Counties of Imperial, Inyo, Kern, Los Angeles, Mono, Riverside, San Bernardino, and San Diego. The director may thereafter revise the boundaries of the areas of the state which shall be subject to this division after a public hearing required to be held pursuant to Section 80074 and upon receipt of a resolution approving the change of boundaries by the board of supervisors of the affected county.

(Added by renumbering Section 70502 by Stats. 1984, Ch. 144, Sec. 45.)