40 CFR § 63.1083 - Does this subpart apply to my heat exchange system?

---
identifier: "/us/cfr/t40/s63.1083"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "40 CFR § 63.1083 - Does this subpart apply to my heat exchange system?"
title_number: 40
title_name: "Protection of Environment"
section_number: "63.1083"
section_name: "Does this subpart apply to my heat exchange system?"
chapter_name: "ENVIRONMENTAL PROTECTION AGENCY"
subchapter_number: "C"
subchapter_name: "AIR PROGRAMS"
part_number: "63"
part_name: "NATIONAL EMISSION STANDARDS FOR HAZARDOUS AIR POLLUTANTS FOR SOURCE CATEGORIES"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "42 U.S.C. 7401"
regulatory_source: "57 FR 61992, Dec. 29, 1992, unless otherwise noted."
cfr_part: "63"
---


# 63.1083 Does this subpart apply to my heat exchange system?

The provisions of this subpart apply to your heat exchange system if you own or operate an ethylene production unit expressly referenced to this subpart XX from subpart YY of this part. The provisions of subpart A (General Provisions) of this part do not apply to this subpart except as specified in subpart YY of this part.