The department shall adopt regulations for toilet, shower, and laundry facilities in parks. The department shall propose and submit building standards for approval pursuant to Chapter 4 (commencing with Section 18935) of Part 2.5 for the purposes described in this section. The building standards published in the California Building Standards Code and the other regulations adopted by the department shall establish standards and requirements which protect the health, safety, and general welfare of the residents of parks, and shall require proper maintenance of those facilities. The building standards published in the California Building Standards Code and the other regulations adopted by the department shall provide equivalent or greater protection to the residents of parks than the statutes and regulations in effect on December 31, 1977.