{
  "dataset": "cfr-unit-pairs",
  "title": "Dual-unit quantity pairs in the Code of Federal Regulations",
  "what_a_row_is": "One parenthetical restatement of a quantity in a second measurement system, with the exact conversion computed from defined factors and the residual attached. The verdict is about the two numbers as published, and about nothing else.",
  "what_this_is_not": "Not legal advice, and not a claim that any provision is invalid, unenforceable or unsafe. A row marked \"contradiction\" says the two numbers in one sentence cannot both be right. Which one governs is a question for the agency and a lawyer.",
  "edition": "The eCFR is amended daily, and each title in this extraction was built by govinfo on its own date. The per-title sha256 and build date are in the sources list and in research/the-laws-own-arithmetic/sources.json.",
  "sources": [
    {
      "id": "govinfo-ecfr",
      "title": "Electronic Code of Federal Regulations, bulk XML, all 49 published titles",
      "publisher": "U.S. Government Publishing Office (govinfo bulkdata)",
      "url": "https://www.govinfo.gov/bulkdata/ECFR",
      "accessed": "2026-09-13",
      "licence_id": "US-GOV-PD",
      "licence": "Work of the United States Government, not subject to copyright (17 U.S.C. 105)",
      "licence_basis": "statute",
      "licence_note": "The Code of Federal Regulations is a work of the United States Government and an edict of government: uncopyrightable under 17 U.S.C. 105 and Georgia v. Public.Resource.Org, 590 U.S. 255 (2020). Neither GPO nor the data.gov entry publishes an explicit licence statement for the bulkdata files, and that silence is recorded here as silence rather than upgraded into a grant; the statute and the case are the basis, not a publisher notice. govinfo bulkdata is used rather than the eCFR API because www.ecfr.gov/robots.txt disallows /api/versioner/v1/full/."
    },
    {
      "id": "artwaste-land",
      "title": "The extraction, the conversions and the hand-check",
      "publisher": "Artificial Wasteland",
      "url": "https://artwaste.land/strata/the-laws-own-arithmetic/",
      "accessed": "2026-09-13",
      "licence_id": "CC0-1.0",
      "licence": "CC0 1.0 Universal (public domain dedication)",
      "licence_basis": "publisher-statement",
      "licence_note": "Ours, dedicated to the public domain. The generator is research/the-laws-own-arithmetic/."
    }
  ],
  "rows": 21807
}