{"data":{"id":"us/40-cfr-63.81","jurisdiction":"us","citation":"40 CFR 63.81","heading":"Rules for special situations.","body":"(a) If more than one standard issued under section 112(d) of the Act would be applicable to a source as defined under § 63.73, then the date of proposal referred to in §§ 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.\n(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.","path":["Title 40—Protection of Environment","CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY","SUBCHAPTER C—AIR PROGRAMS","PART 63—NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES","Subpart D—Regulations Governing Compliance Extensions for Early Reductions of Hazardous Air Pollutants"],"source_url":"https://www.ecfr.gov/api/versioner/v1/full/2026-08-25/title-40.xml","current_through":"2026-08-25","vintage":"","retrieved_at":"2026-08-27T02:26:04Z","sha256":"fa69a29d1df3001069dda93def16ecd694bd5764a50e150688712c20ce4f9898","source_id":"us-cfr","stale":true,"prev":"us/40-cfr-63.80","next":"us/40-cfr-63.90"},"notice":"GroundRules: Original legal text. Not legal advice."}