(A) The commission by regulation shall classify residential specialty contractors in a manner consistent with established usage and procedure in the construction business and may limit the field and scope of the operations of a residential specialty contractor to those in which he is to be registered or certified. Residential specialty contractor registrations and certificates issued by the commission may not be for more than three of the classifications recognized by the commission. Residential specialty contractors registered or certified or wishing to be registered or certified for more than three classifications must be examined and licensed as residential builders.

(B) Residential specialty contractors must be qualified and experienced in the particular areas of the contracting vocation in which they intend to, and do, engage. The commission, by regulation, may require examination in these areas.

(C) Residential specialty contractors are not exempt from complying with county and municipal business license ordinances or other regulatory ordinances. A county or municipality may require a residential specialty contractor to be examined and licensed in accordance with standards adopted by the county or municipality; however, if a residential specialty contractor has passed an examination in his area of contracting and approved by the commission, no additional examination may be required by a county or municipality.

(D) When the total cost of materials and labor for an undertaking performed by a residential specialty contractor for an individual property owner exceeds five thousand dollars, the residential specialty contractor shall obtain an executed bond with a surety in an amount approved by the commission and shall furnish a signed original to the commission.