Methodology

How the regulation database was built

Every claim below is checkable on any state page in one click. We state only what we can show.

• A citation per claim. Each requirement on a jurisdiction page carries an inline citation to the statute, administrative rule, or official agency source it rests on.
• Lookups tested, with dated examples. Where a public license lookup exists, we record what we could and couldn't confirm and the date we tested it — see, for example, Alaska.
• A three-tier evidence standard, shown in the open. Each page displays its evidence tier (for example, an official-source review versus a secondary-only summary), so you can weigh it yourself.
• All 56 U.S. jurisdictions. 50 states, the District of Columbia, and 5 territories.
• Annual re-verification. Entries carry a last-checked date and are re-verified on a recurring cycle; corrections are published the day they are made.

Terminology: "Nano Brows" is our editorial umbrella for overlapping cosmetic eyebrow-tattoo services. Regulatory summaries preserve the terminology and scope used by the cited jurisdiction — a technique-specific rule is never silently extended beyond its stated scope.

Corrections policy

Corrections arrive through our submission form. A human verifies each one, we correct verified factual errors promptly, and every retraction or material correction is recorded publicly — the day it is made — in the corrections log. The log is append-only; entries are never deleted.

Provenance & data access

The Index is published as structured data (a schema.org Dataset) on the index page. There is no bulk download file; the pages and their citations are the record.