# Mandatory Reporting of Greenhouse Gases: Technical Revisions to the Petroleum and Natural Gas Systems Category of the Greenhouse Gas Reporting Rule
> **Rule** · Final rule. · Published 2011-12-23 · Effective 2011-12-28 · 76 FR 80554
## Document
- **Document number:** 2011-31532
- **Category:** air-emissions
- **Federal Register citation:** 76 FR 80554
- **CFR reference:** 40 CFR 98
- **Publication date:** 2011-12-23
- **Effective date:** 2011-12-28
- **EPA docket:** EPA-HQ-OAR-2011-0512
## Abstract

EPA is finalizing technical corrections and revisions to the petroleum and natural gas systems source category of the Greenhouse Gas Reporting Rule. Final changes include providing clarification on existing requirements, increasing flexibility for certain calculation methods, amending data reporting requirements, clarifying terms and definitions, and technical corrections.

## Source
- [Federal Register document](https://www.federalregister.gov/documents/2011/12/23/2011-31532/mandatory-reporting-of-greenhouse-gases-technical-revisions-to-the-petroleum-and-natural-gas-systems)
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