Cal. Pub. Res. Code § 4578

Timber operations, timber harvesting, and any other activities pursuant to a timber harvest plan or a federal or state timber sales contract are exempt from the provisions of Chapter 9 (commencing with Section 7000) of Division 3 of the Business and Professions Code, and no license shall be required for the conduct of timber operations on private or public lands, other than as provided in Section 4571.