VAvaquill
US Statutes

Get the Federal Register documents behind a CFR section

Federal Register documents linked to one CFR section, from two signals.

Cost: 2 credits. Not-found and failed lookups are not charged.

printed_note: the section's printed source note cites 83 FR 1234, and a Federal Register rule of the same CFR title and part spans that page of that volume and was published on the date printed. Pre-1994 citations (legacyPrintedCitations) are kept as text and never resolved. date_join: a rule referencing the section's CFR title and part took effect (or was published) on a date eCFR records as an amendment of this section. matchBasis says which; quality is verified only when both agree and candidate otherwise. Each eCFR version row in versions gets a tier: confirmed, candidate (one date match), ambiguous (two or more documents, none picked) or unmatched (the row only). A document found only in the printed note, with no version row meeting its dates, is candidate in both quality and tier. Corrections are attached to their parent in corrections. A candidate is a lead, not a finding: a rule that touches the part on the same day as an amendment may not be the one that amended this section.

A printed note can be stale. noteIsStale is true when eCFR records an amendment later than the newest dated citation the note prints. Newer documents then appear only as date_join candidates. unresolvedCitations lists printed citations we could not match to a document; that is absence in our corpus, never proof the citation is wrong. Read coverage.

get/api/v1/us/statutes/section/{act_id}/rulemaking

Request

Path parameters

act_idstring required

Section identifier, e.g. USC_T42_C21_S1983 (Title 42, Chapter 21, Section 1983, which a lawyer writes as 42 U.S.C. § 1983). Take it from a /us/statutes/search or /us/statutes/resolve result.

A citation also works here: 26 U.S.C. § 1, 42 USC 1983 or Cal. Civ. Code § 1950.5 is resolved with the same resolver /resolve uses, and the section is served. A citation costs this endpoint's price PLUS the /resolve price (2 credits), charged as its own line whether or not it resolves, exactly as /resolve charges; that is the same total as calling /resolve and then this endpoint, in one round trip. An exact act_id costs only this endpoint's price. When a citation resolves, or when the id only matched after surrounding whitespace, quotes or a trailing period were removed, the response carries resolvedFrom saying what your input was matched as. Check it the way you would check a /resolve answer. A citation containing / cannot travel in a URL path segment; resolve it with GET /us/statutes/resolve instead.

Do not assemble an id from a citation: the title and section are derivable, but the CHAPTER is not, so USC_T26_S1 misses. A miss returns 404 with reason and, where the section exists under another id, didYouMean.

State session laws (acts as enacted, ids starting SSL_) are not code sections: read them at /us/session-laws/{sessionLawId}.

Example:CFR_T21_P314_S314_50

Headers

Idempotency-Keystring nullable

Optional. 16 to 255 visible ASCII characters (a UUIDv4 is ideal). A retry with the same key and the same request replays the original 2xx response for 24 hours without charging again. The same key with a different request is rejected. Scope is the API key, method, path and body. The stored response body is a query-derived cache controlled by the account's data retention setting cacheQueryDerivedData: when it is false the body is never stored and a retry answers 409 idempotency_replay_unavailable, without charging again.

Example:3f9c2a1e-7b44-4d0a-9c1e-5a6b7c8d9e0f

Response

Successful Response

actIdstring required
cfrTitleinteger required
cfrPartstring required
printedNoteCitationsstring[] required
unresolvedCitationsstring[] required
noteIsStaleboolean required
coveragestring[] required
processingTimeMsnumber required
creditsConsumedinteger required

Example response

{
  "resolvedFrom": {
    "input": "26 U.S.C. § 1",
    "actId": "USC_T26_C1_S1",
    "via": "citation",
    "subsection": "(h)(11)",
    "matchLevel": "container",
    "container": {
      "kind": "chapter",
      "label": "U.S. Const. art. III",
      "childCount": 12,
      "children": [
        {
          "actId": "CONST_US_A3_S1",
          "citation": "U.S. Const. art. III, § 1",
          "status": "in_force"
        }
      ]
    },
    "repair": {
      "kind": "code_name",
      "cited": "Jud. Ct. Acts Law",
      "interpretedAs": "N.Y. Judiciary Law § 475",
      "alternatives": [
        {
          "actId": "STATE_NY_FCT_S475",
          "citation": "N.Y. Fam. Ct. Act § 475"
        }
      ]
    },
    "registerReference": {
      "citation": "36 Pa. Bull. 510",
      "state": "il",
      "kind": "page",
      "ruleCount": 2
    }
  },
  "federalRegisterDocuments": [
    {
      "rulemakingUrl": "/api/v1/us/rulemaking/rins/0910-AI40"
    }
  ]
}

Changes

No recorded changes to this operation across all 1 revision of this API.