Except as otherwise specifically provided in this division, enactment of this division does not increase, decrease, duplicate or supersede the authority of any existing state agency.

This chapter shall not be construed to limit in any way the regulatory controls over development pursuant to Chapters 7 (commencing with Section 30600) and 8 (commencing with Section 30700), except that the commission shall not set standards or adopt regulations that duplicate regulatory controls established by any existing state agency pursuant to specific statutory requirements or authorization.