Our Methodology
Drug Law Travel Map is committed to providing accurate, source-verified compliance information sourced from official government, customs, health authority, and regulatory sources. This page explains how we research, verify, rate, and maintain the information on this platform.
Research Process
How Laws Are Researched
Our research process begins with official government publications, including legislation, regulatory guidance, customs authority directives, and health ministry publications. We do not rely on third-party summaries, news articles, or unverified sources as primary references.
How Government Sources Are Identified
We identify official sources by verifying domain authority (official government domains such as .gov, .gov.uk, .gc.ca, .go.jp), cross-referencing multiple official publications, and confirming the issuing authority's jurisdiction over the relevant laws.
How Destination Profiles Are Created
Destination profiles are created by researching the destination's applicable laws for each substance category, identifying official source references, assigning appropriate risk ratings based on our risk rating methodology, and documenting documentation requirements and customs regulations.
Source Verification
How Official Sources Are Verified
We verify official sources by confirming the issuing authority, checking publication date, and cross-referencing with embassy advisories, consular guidance, and where available, legal publications. Sources that cannot be independently verified are not used.
Source Review Standards
We apply a government-first information policy. Official government and health authority sources take precedence over all other sources. Information from unofficial or unverifiable sources is not used.
Government-First Information Policy
Drug Law Travel Map prioritizes official government, customs, health authority, and regulatory publications as primary sources. Third-party content, news articles, and user-generated information are not used as sources for compliance data.
Risk Rating Methodology
Legal
Permitted under applicable laws when requirements are met.
Medical Only
Permitted only for approved medical use under specific regulations.
Prescription Required
Travelers must possess a valid prescription and supporting documentation.
Restricted
Permitted only under specific limits, approvals, quantity restrictions, or documentation requirements.
Illegal
Prohibited under destination laws.
Severe Penalty
Violations may result in arrest, detention, significant fines, imprisonment, deportation, or other serious legal consequences.
Unknown / Verify Before Travel
Reliable official information is unavailable or unclear. Travelers must verify directly with the relevant authority.
Data Review Process
Review Schedules
Destination profiles are reviewed when official sources report changes to relevant laws or regulations. High-traffic destinations are reviewed more frequently.
Update Procedures
When a change is identified, the affected destination profile is updated and the change is logged with the updated source reference and verification date.
Change Monitoring
We monitor official government publication channels, health authority announcements, and embassy advisories for regulatory changes affecting travel medication compliance.
Jurisdiction Considerations
State vs. Federal Law
In the United States and other federalist systems, federal law, state or provincial law, and local law may differ significantly. Drug Law Travel Map displays federal law as the primary reference for international border crossings, as federal law governs customs and international entry. State or provincial laws are noted where relevant but do not override federal requirements at international borders.
International Customs Considerations
Customs enforcement at international borders is governed by the destination country's federal or national law, regardless of state, provincial, or local law. Travelers should review both federal and local requirements for their destination.
Conflicting Laws
When legal frameworks conflict — for example, when a substance is legal at state level but prohibited federally — Drug Law Travel Map notes the conflict and displays the more restrictive requirement as the travel-applicable rule for international border purposes.