Pennsylvania Code
Title 25 - ENVIRONMENTAL PROTECTION
Part I - Department of Environmental Protection
Subpart D - Environmental Health and Safety
Article V - Radiological Health
Chapter 227a - RADIATION SAFETY REQUIREMENTS FOR NON-HEALING ARTS RADIATION-PRODUCING DEVICES
Subchapter B - GENERAL TECHNICAL REQUIREMENTS
Section 227a.12 - Labeling

(a) General rule. A radiation-producing device must be labeled with a readily visible and discernible sign or signs bearing the radiation symbol and the words: "CAUTION RADIATION-THIS EQUIPMENT PRODUCES RADIATION WHEN ENERGIZED," or words having a similar intent, near every switch that energizes an X-ray tube.

(b) Devices with designed openings. For radiation-producing devices with designed openings for object entries, such as baggage units, the following must be posted at or near every opening: "CAUTION-X-RAY HAZARD: DO NOT INSERT ANY PART OF THE BODY WHEN SYSTEM IS ENERGIZED" or words having similar intent.