N.J. Stat. § 45:16A-33: Licensure required for certain actions relative to gas piping.

6. No person shall install, improve, repair, or maintain gas piping associated with barbecue appliances, hearth product appliances, outdoor patio appliances, decorative space heater appliances, or hearth professional work unless licensed by the board as a master hearth specialist in accordance with the provisions of P.L.2019, c.260 (C.45:16A-29 et al.).

L.2019, c.260, s.6.