20.1704—Further restrictions on the use of respiratory protection equipment.
         The Commission may impose restrictions in addition to the provisions of  §§ 20.1702, 20.1703, and Appendix A to  Part 20, in order to:
    
    
        
        (a) 
         Ensure that the respiratory protection program of the licensee is adequate to limit doses to individuals from intakes of airborne radioactive materials consistent with maintaining total effective dose equivalent ALARA; and
    
    
        
        (b) 
         Limit the extent to which a licensee may use respiratory protection  equipment instead of process or other engineering controls.