Section 144-220-D-J-1903 - Exceptions to posting requirementsA. A licensee or registrant is not required to post caution signs in areas or rooms containing sources of radiation for periods of fewer than eight hours, if each of the following conditions is met:(1) The sources of radiation are constantly attended during these periods by an individual who takes the precautions necessary to prevent the exposure of individuals to sources of radiation in excess of the limits established in Part D; and(2) The area or room is subject to the licensee's or registrant's control.B. Rooms or other areas in hospitals that are occupied by patients are not required to be posted with caution signs pursuant to D.1902 provided that the patient could be released from confinement pursuant to Part G of this rule.C. A room or area is not required to be posted with a caution sign because of the presence of a sealed source provided the radiation level at 30 centimeters from the surface of the sealed source container or housing does not exceed 0.05 mSv (0.005 rem) per hour.D. Rooms in hospitals or clinics that are used for teletherapy are exempt from the requirement to post caution signs under D.1902 if: (1) Access to the room is controlled pursuant to G.604; and(2) Personnel in attendance take necessary precautions to prevent the inadvertent exposure of workers, other patients, and members of the public to radiation in excess of the limits established in this part.E. A room or area is not required to be posted with a caution sign because of the presence of radiation machines used solely for diagnosis in the healing arts.10-144 C.M.R. ch. 220, § D-J-1903