Air Programs Permits Regulation
---
identifier: "/us/fr/01-55526"
source: "fr"
legal_status: "authoritative_unofficial"
title: "Air Programs Permits Regulation"
title_number: 0
title_name: "Federal Register"
section_number: "01-55526"
section_name: "Air Programs Permits Regulation"
positive_law: false
currency: "2001-08-15"
last_updated: "2001-08-15"
format_version: "1.1.0"
generator: "[email protected]"
agency: "Environmental Protection Agency"
document_number: "01-55526"
document_type: "rule"
publication_date: "2001-08-15"
agencies:
- "Environmental Protection Agency"
cfr_references:
- "40 CFR Part 72"
fr_citation: "66 FR 42761"
fr_volume: 66
---
# Definitions
**CFR Correction**
In Title 40 of the Code of Federal Regulations, parts 72 to 80, revised as of July 1, 2000, § 72.2 is corrected by removing the definition of *Protocol 1 gas* and by adding the definition of *Standard reference material* or *SRM* to read as follows:
§ 72.2
*Standard reference material* or *SRM* means a calibration gas mixture issued and certified by NIST as having specific known chemical or physical property values.