Section 120.431 - Purpose and Scope(A)105 CMR 120.430 establishes requirements, for which the registrant is responsible, for use of therapeutic radiation machines. The provisions of 105 CMR 120.430 are in addition to, and not in substitution for, other applicable provisions of 105 CMR 120.000.(B) The use of therapeutic radiation machines shall be by, or under the supervision of, a licensed practitioner of the healing arts who meets the training/experience criteria established by 105 CMR 120.433(C).