Posting.

All areas in which industrial radiography is being performed must be conspicuously posted as required by § 20.1902(a) and (b) of this chapter. Exceptions listed in § 20.1903 of this chapter do not apply to industrial radiographic operations. [62 FR 28963, May 28, 1997, as amended at 66 FR 64738, Dec. 14, 2001]