[Code of Federal Regulations] [Title 10, Volume 1] [Revised as of January 1, 2003] From the U.S. Government Printing Office via GPO Access [CITE: 10CFR20.1705] [Page 344] TITLE 10--ENERGY CHAPTER I--NUCLEAR REGULATORY COMMISSION PART 20--STANDARDS FOR PROTECTION AGAINST RADIATION--Table of Contents Subpart H--Respiratory Protection and Controls to Restrict Internal Exposure in Restricted Areas Sec. 20.1705 Application for use of higher assigned protection factors. The licensee shall obtain authorization from the Commission before using assigned protection factors in excess of those specified in Appendix A to part 20. The Commission may authorize a licensee to use higher assigned protection factors on receipt of an application that-- (a) Describes the situation for which a need exists for higher protection factors; and (b) Demonstrates that the respiratory protection equipment provides these higher protection factors under the proposed conditions of use. [64 FR 54557, Oct. 7, 1999]