Sources and licences

Trip Rulebook republishes information from three governments and uses two open datasets. We do not use government logos or crests, and nothing on this site should be read as endorsement by any government.

United Kingdom

Travel advice from the Foreign, Commonwealth & Development Office, published on GOV.UK and obtained through the GOV.UK Content API. Contains public sector information licensed under the Open Government Licence v3.0. We reproduce selected sections without changing their wording; we adapt the formatting and make links absolute. Last checked by Trip Rulebook on 30 September 2026.

United States

Travel advisory levels from the U.S. Department of State, obtained from its official travel advisories feed. Works of the U.S. federal government are generally not subject to copyright in the United States; we credit the source on every page regardless. Last checked by Trip Rulebook on 30 September 2026.

Canada

Travel advice and advisory levels from Global Affairs Canada, obtained from the Country Travel Advice and Advisories open dataset, in English and French. Contains information licensed under the Open Government Licence – Canada. Last checked by Trip Rulebook on 30 September 2026.

Plugs and voltage

Plug types, voltage and frequency come from the Wikipedia article “Mains electricity by country”, licensed under CC BY-SA 4.0. Our copy of that table is shared under the same licence. The International Electrotechnical Commission retired its “World Plugs” guide, which the table was based on, in September 2026.

Climate averages

Monthly temperature and rainfall averages for 1991–2020 come from the World Bank Climate Change Knowledge Portal, licensed under CC BY 4.0, and are derived from the CRU TS dataset of the Climatic Research Unit, University of East Anglia. They are national averages. The clothing suggestions next to them are Trip Rulebook's own, produced by fixed rules from those averages.

Country names

Country and territory names in languages other than English come from the Unicode Common Locale Data Repository (CLDR).

How the levels relate

They do not map onto each other. The UK government does not use numbered levels; it states whether it advises against all travel or all but essential travel, to the whole country or to parts of it. The United States and Canada each use four levels, with different wording and criteria. Trip Rulebook shows each one exactly as published, next to the others, and leaves the comparison to you.