(a) Nothing in this chapter limits the power of a municipality, a county, or the state to require the submission and approval of plans and specifications or to regulate the quality and character of work performed by contractors through a system of permits, fees, and inspections otherwise authorized by law for the protection of the public health and safety.

(b) No municipality or county shall impose any other requirements on persons licensed or permitted by the Commissioner as set forth in this chapter to prove competency to conduct any activity covered by said license or permit.