Radiation therapy machines and associated devices and equipment; radiation therapy simulation systems; installation, maintenance & repair; general administrative and facility requirements; shielding and safety design; technical requirements; safety procedures; radiation protection devices; personnel licensure, education, training and supervision; quality assurance/management; authorized users; radiation safety committee; radiation safety officer; radiation protection program, including authority and responsibilities; surveys and survey instruments; calibration; definitions; forms; registration; records; notifications; reporting; signage; posting; written directives; mobile services; dosimetry; and computer systems.