The protective barrier may not transmit more than 2 milliroentgens (.516 µmC/kg) per hour at 10 centimeters from an accessible surface of the fluoroscopic imaging assembly for each roentgen per minute of entrance exposure rate.
25 Pa. Code § 221.39a
The provisions of this §221.39a 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 § 221.43a (relating to mobile fluoroscopes).