The or "proposed rules" currently being reviewed for Part 51

: Subpart A detail how states must report their data to the EPA.

: To get the raw text/XML files for Title 40 (which includes Part 51), visit the GPO GovInfo Bulk Data page.

: It outlines the exact process states must follow to show they are meeting federal air quality goals.

A of a specific Subpart (e.g., Subpart P for Regional Haze)

Note: You may need to download the full Title 40 ZIP and extract Part 51. 📝 Long Review: 40 CFR Part 51

You can access the text version of the Electronic Code of Federal Regulations (eCFR) directly: : 40 CFR Part 51