California Code, Public Resources Code - PRC § 4736

No operation of a corporation operating pursuant to this article, involving the cutting of timber or other work upon forest lands shall be commenced without the approval of the board. For the purpose of regulating the conduct of such corporations the board shall establish reasonable regulations regarding adequate fire protection, protection of timber against infestation of forest insects, protection against tree disease epidemics, and provision for natural or artificial reforestation of the areas cut over. The board may make such other reasonable regulations regarding the operation of such corporations as in its opinion is necessary for the proper preservation or protection of the forests and forest lands.