Except as otherwise specifically provided in other Parts of 105 CMR 120.000, 105 CMR 120.200 applies to persons licensed or registered by the Department to receive, possess, use, transfer, or dispose of sources of radiation. The limits in 105 CMR 120.200 do not apply to doses due to background radiation, to exposure of patients to radiation for the purpose of medical diagnosis or therapy, to exposure from individuals administered radioactive material and released in accordance with 105 CMR 120.540 or to voluntary participation in medical research programs.
105 CMR, § 120.202