(a) Any improvement existing within the state park system as of January 1, 1979, which fails to comply with the provisions of former Section 5001.5 as they read immediately prior to January 1, 1979, or Article 1.7 (commencing with Section 5019.50) of this chapter shall not be expanded.
(b) No new facility may be developed in any unit of the state park system unless it is compatible with the classification of the unit.