[Code of Federal Regulations] [Title 10, Volume 1] [Revised as of January 1, 2001] From the U.S. Government Printing Office via GPO Access [CITE: 10CFR35.220] [Page 569] TITLE 10--ENERGY CHAPTER I--NUCLEAR REGULATORY COMMISSION PART 35--MEDICAL USE OF BYPRODUCT MATERIAL--Table of Contents Subpart E--Imaging and Localization Sec. 35.220 Possession of survey instruments. A licensee authorized to use byproduct material for imaging and localization studies shall have in its possession a portable radiation detection survey instrument capable of detecting dose rates over the range of 0.1 millirem per hour to 100 millirem per hour, and a portable radiation measurement survey instrument capable of measuring dose rates over the range 1 millirem per hour to 1000 millirem per hour.