The Nuclear Regulatory Commission (NRC) is amending its regulations regarding the use of respiratory protection and other controls to restrict intake of radioactive material. The amendments make these regulations more consistent with the philosophy of controlling the sum of internal and external radiation exposure, reflect current guidance on respiratory protection from the American National Standards Institute (ANSI), are consistent with recently effective revisions to Occupational Safety and Health Administration (OSHA's) respiratory protection rule, and make NRC requirements for radiological protection less prescriptive while reducing unnecessary regulatory burden without reducing worker protection. The amendments provide greater assurance that worker dose will be maintained as low as is reasonably achievable (ALARA) and that recent technological advances in respiratory protection equipment and procedures are reflected in NRC regulations and clearly approved for use by licensees.