Cal. Pub. Res. Code § 4593.8

The nonindustrial tree farmer may submit a proposed amendment to the approved plan and may not take any action which substantially deviates, as defined by the board, from the approved plan until the amendment has been filed with the director and the director has determined that the amendment is in compliance with the rules and regulations of the board and the provisions of this chapter which were in effect at the time the nonindustrial timber management plan was approved, in accordance with the same procedures specified in Section 4593.7.