Cal. Health & Safety Code § 18862.5

“Camping cabin” means a relocatable hard sided shelter with a floor area less than 400 square feet (37 square meters) without plumbing that is designed to be used within a recreational vehicle park only by a camping party. A camping cabin may contain an electrical system and electrical space conditioning equipment complying with the electrical and mechanical regulations adopted pursuant to this part and supplied by the lot service equipment. A camping cabin may be installed or occupied only in special occupancy parks, as defined by Section 18862.43, or in state parks and other state property pursuant to Chapter 1 (commencing with Section 5001) of Division 5 of the Public Resources Code.