Data Sources
Arca draws on a comprehensive set of primary legal sources — continuously updated so every answer is grounded in current, authoritative law.
01
Primary legal authority from federal and state courts across all jurisdictions.
Full-text opinions and docket records from federal circuit and district courts via CourtListener and PACER.
Every published decision from the United States Supreme Court.
Appellate opinions and docket records from all 50 states and Washington, D.C. Deep coverage for California, New York, Texas, Delaware, Florida, Illinois, New Jersey, Pennsylvania, Virginia, Washington, Ohio, Michigan, North Carolina, and D.C.
02
Enacted law at the federal level and across all 50 states, kept current.
The codified permanent federal statutes of the United States.
The official compilation of all rules published by federal agencies, via eCFR.
Proposed rulemakings, final rules, and regulatory notices from federal agencies.
Bills, resolutions, and enacted legislation from Congress.gov and GovInfo.
Public comments, proposed rules, and agency decisions across federal regulatory dockets.
Current statutory codes from every US state legislature.
03
Agency guidance, enforcement actions, and regulatory materials from key federal regulators.
Public company filings, no-action letters, enforcement actions, and rulemaking from the Securities and Exchange Commission.
Federal Trade Commission regulations, consent orders, and enforcement guidance.
Department of Justice opinions, enforcement guidance, and policy documents.
Consumer Financial Protection Bureau rules, enforcement actions, and supervisory guidance.
Equal Employment Opportunity Commission guidance, decisions, and enforcement materials.
Department of Labor regulations, opinion letters, and enforcement guidance.
National Labor Relations Board decisions, rules, and guidance documents.
Environmental Protection Agency regulations, guidance, and enforcement actions.
Federal Communications Commission rules, orders, and enforcement actions.
Commodity Futures Trading Commission regulations, guidance, and enforcement actions.
Food and Drug Administration regulations, guidance documents, and enforcement actions.
Department of Health and Human Services regulations, guidance, and enforcement actions.
U.S. Patent and Trademark Office rules, guidance, and examination materials.
Copyright Office regulations, circulars, and official guidance.
04
Federal healthcare regulations, program guidance, and enforcement materials from agencies governing health services, drug policy, and patient privacy.
Centers for Medicare & Medicaid Services regulations, coverage determinations, and program guidance.
Federal Medicaid program rules, state plan guidance, and policy resources.
Food and Drug Administration regulations, guidance documents, and enforcement actions.
Department of Health and Human Services regulations, guidance, and enforcement actions.
HHS Office of Inspector General fraud alerts, advisory opinions, and enforcement actions.
HHS Office for Civil Rights HIPAA enforcement, breach reports, and privacy guidance.
Office of the National Coordinator for Health IT standards, certification rules, and interoperability guidance.
Substance Abuse and Mental Health Services Administration regulations, grants guidance, and 42 CFR Part 2 resources.
Health Resources and Services Administration program guidance, 340B rules, and health workforce regulations.
Drug Enforcement Administration controlled-substance schedules, regulations, and enforcement actions.
DEA Diversion Control Division rules for prescriber registration, quota, and controlled-substance dispensing.
05
Real-time screening across 40+ global watchlists for AML, KYC, and export-control compliance.
The US Treasury's Specially Designated Nationals and Blocked Persons list.
Consolidated list of persons, groups, and entities subject to EU financial sanctions.
Additional US government watchlists covering debarment, exclusions, and restricted parties.
Global PEP data for enhanced due-diligence and anti-corruption screening.
Federal and state lists of parties excluded from government contracting.
06
Primary legal sources from the European Union and 12 additional international jurisdictions.
Regulations, directives, and decisions from EUR-Lex; Court of Justice opinions from CURIA.
Official EDPB guidelines, opinions, and recommendations on GDPR interpretation.
ECtHR judgments and decisions via HUDOC.
Bundesgesetzblatt, Gesetze im Internet, Bundesgerichtshof, and Bundesverfassungsgericht.
UK Legislation, UK Judiciary decisions, and Information Commissioner's Office guidance.
Justice Laws Website (federal statutes and regulations) and Supreme Court of Canada decisions.
Federal Register of Legislation, High Court of Australia, and Federal Court of Australia.
NZ Legislation and Courts of New Zealand decisions.
Singapore Statutes Online and Singapore Judiciary decisions.
Hong Kong e-Legislation and Hong Kong Judiciary decisions.
Irish Statute Book and Courts Service of Ireland decisions.
India Code (central legislation) and Supreme Court of India decisions.
Legifrance — consolidated French legislation and official texts.
Fedlex — the official Swiss Federal Legislation portal.
07
Patent filings and prior art from US and international patent offices.
Granted patents and published applications via Google Patents and Justia Patents, covering USPTO filings and major international patent offices.
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