As used in this subpart:
(a) Welder and welding operator mean any operator of electric or gas welding and cutting equipment.
(b) Approved means listed or approved by a nationally recognized testing laboratory. Refer to Sec. 1910.155(c)(3) for definitions of listed and approved, and Sec. 1910.7 for nationally recognized testing laboratory. [55 FR 13696, Apr. 11, 1990, as amended at 61 FR 9240, Mar. 7, 1996; 72 FR 71070, Dec. 14, 2007]