[Code of Federal Regulations] [Title 40, Volume 9] [Revised as of July 1, 2006] From the U.S. Government Printing Office via GPO Access [CITE: 40CFR63.81] [Page 102] TITLE 40--PROTECTION OF ENVIRONMENT CHAPTER I--ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) PART 63_NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES--Table of Contents Subpart D_Regulations Governing Compliance Extensions for Early Reductions of Hazardous Air Pollutants Sec. 63.81 Rules for special situations. (a) If more than one standard issued under section 112(d) of the Act would be applicable to a source as defined under Sec. 63.73, then the date of proposal referred to in Sec. Sec. 63.72(a)(2), 63.72(c), 63.74(d)(4), 63.75(c), and 63.77(c) is the date the first applicable standard is proposed. (b) Sources emitting radionuclides are not required to reduce radionuclides by 90 (95) percent. Radionuclides may not be increased from the source as a result of the early reductions demonstration.