California Code, Public Resources Code - PRC § 43205

(a) Except as provided in subdivision (b), if no enforcement agency is designated and certified, the board shall be the enforcement agency and shall assume all the powers and duties of an enforcement agency pursuant to this chapter, subject to the agreement required pursuant to Section 43212.1 or 43310.1. If the board is the enforcement agency and an enforcement agency is then designated and certified by the board, the board shall continue to act as the enforcement agency for the remainder of the fiscal year, with those responsibilities terminating as of June 30, unless otherwise specified by the board.

(b) Notwithstanding subdivision (a), if no enforcement agency is designated and certified for Stanislaus County or Santa Cruz County, the board shall be the enforcement agency, and shall assume all of the powers and duties of an enforcement agency for that county, but shall not be required to enter into the agreement required pursuant to Sections 43212.1 or 43310.1.

(c) The board and the enforcement agency shall not, at any time, impose duplicative fees or charges on the owner or operator of a solid waste facility.