(b) Requirements for the construction, alteration, or conversion of commercial modulars shall be those contained, with reasonably necessary additions or deletions, as adopted by department regulations, in all of the following:

1. (1) The 1991 Edition of the Uniform Building Code, published by the International Conference of Building Officials.
2. (2) The 1993 Edition of the National Electrical Code, published by the National Fire Protection Association.
3. (3) The 1991 Edition of the Uniform Mechanical Code, published jointly by the International Conference of Building Officials and the International Association of Plumbing and Mechanical Officials.
4. (4) The 1991 Edition of the Uniform Plumbing Code, published by the International Association of Plumbing and Mechanical Officials.

(c)

1. (1) The department shall, on or after January 1, 2008, adopt regulations for the construction, alteration, or conversion of commercial modulars based on Parts 2, 3, 4, 5, 6, and 11 of the California Building Standards Code, as contained in Title 24 of the California Code of Regulations, with appropriate additions, deletions, and other implementing provisions. The regulations adopted under this paragraph shall be placed within Title 25 of the California Code of Regulations.
2. (2) The requirements promulgated by the department pursuant to this section shall apply only to the construction, alteration, and conversion of commercial modulars, and not to the use or operation of commercial modulars.