California Code, Public Utilities Code - PUC § 21243

The department may make and amend general or special rules, regulations, and procedures and establish minimum standards, consistent with and clearly within the scope of federal legislation governing aeronautics and the rules, regulations, and standards issued thereunder. The department may, by regulation, classify airports into several reasonable classes or groups according to their facilities and the types and number of aircraft which they are capable of handling and may make and amend rules, regulations, and procedures and establish minimum standards for each separate class or group.