Product · /v1/law/lookup?corpus=regulations
The whole C.F.R., and the state codes underneath it.
1,153,613 regulation sections — every title of the Code of Federal Regulations plus 37 state administrative codes and selected chapters of 13 more (which), under the same point-in-time contract as statutes and with the agency guidance that interprets them one corpus away.
Three real records, each one openable. The last is guidance rather than law, sits in its own corpus for that reason, and says so in its own disclaimer — the chain is only useful if the links are labelled.
(a) Election statement. An individual who meets the eligibility requirement of § 418.20 may file an election statement with a particular hospice. If the individual is physically or mentally incapacitated, his or her representative (as defined in § 418.3) may file the election statement.
- citation.display
- 42 C.F.R. § 418.24
- catchline
- Election of hospice care
- status
- active
- validFrom → validTo
- 2026-08-03 → present
- temporalBasis
- act-effective-date
- provenance.sourceSystem
- ecfr.gov
- provenance.versionLabel
- 2026-08-31
- provenance.retrievedAt
- 2026-09-11
The C.F.R. carries act-effective-date validity, so this window is the real one — not an approximation from a publication date.
check this record →Federal + state admin code
The C.F.R. and state administrative codes under one citation-native API, versioned section by section like statutes. Keys are title and section: 42-418.24, 26-1.61-1.
Validity from the amendment itself
Regulations carry act-effective-date validity — the window came from the rule that changed the text, not from when a publisher reprinted the volume. It is the most precise of the four temporal bases the API declares.
Verifiable, byte for byte
Each response carries the official source URL and the content hash of what we retrieved. Re-fetch and re-hash any section yourself, any time.
Freshness
A corpus refreshed only by hand will always be serving somebody last year's rule.
The C.F.R. re-reads monthly and state codes three times a month. This is not a policy invented for a marketing page: on 2026-09-02 a drafting tool pulled 42 C.F.R. § 418.24 and got pre-amendment text because the FY 2027 Hospice Wage Index final rule had rewritten it and nothing had re-read the title. The corpus last read its sources on 2026-10-24, and that date is on the public coverage endpoint for you to watch rather than take on trust.