Radiation emitted from an X-ray tube when the exposure switch or timer in not activated may not exceed a rate of 2 milliroentgens (0.516 µC/kg) per hour at 5 centimeters from an accessible surface of a fully charged diagnostic source assembly, with the beam-limiting device fully open.
25 Pa. Code § 221.33a
The provisions of this §221.33a issued under sections 301 and 302 of the Radiation Protection Act (35 P. S. §§ 7110.301 and 7110.302); and section 1920-A of The Administrative Code of 1929 (71 P. S. § 510-20).
This section cited in 25 Pa. Code § 221.35a (relating to fluoroscopic X-ray systems).