Resources

External links for this lesson. All checked to load from a plain browser request as of the date this page was written. (Note: eCFR’s own site — ecfr.gov — blocks automated/proxied traffic with a bot check, which is what this repo’s build environment runs on, so its pages can’t be verified from here even though a human browser reaches them fine; the regulation text quoted in this lesson instead comes straight from eCFR’s public API, and the links below use two verified-loading mirrors of the same official text.)

• Cornell LII: 21 CFR 606.160, current text — Cornell Law School’s Legal Information Institute hosts a free, continuously updated mirror of the CFR. This is the live, current version of the exact section quoted in this lesson — regulations get amended, so use this to check whether the text has changed since this lesson was written, unlike the dated snapshot saved in this repo’s sources/ folder.

• Cornell LII: Title 21 browse index — browse the whole title/chapter/subchapter/part/section tree this lesson’s decoder table walks through, to see the numbering system in context.

• GovInfo: Code of Federal Regulations — the U.S. Government Publishing Office’s official, legally authoritative annual CFR archive (PDF and XML, by year). This is where you go if you ever need the official, dated, legally citable version of a specific year’s CFR text — for example, to confirm exactly what a regulation said on the date of a past inspection.