A person who is in the business of repairing safety valves must hold a certificate of authorization from the National Board for the use of a National Board Pressure Relief Valve Repair stamp, designated by the National Board as a "VR" stamp.
Nev. Admin. Code § 455C.218
Added to NAC by Div. of Industrial Relations by R101-02, eff. 12-15-2004
NRS 455C.110