Independent permit intelligence. Grounded in official sources.
Trust & transparency

Official sources

Every answer has a starting point.

Inspect the official publications behind our guides. Each use is labeled as a guide citation, supplement source or archived reference, with a link to the relevant section or review history.

Search all captured official documents and saved versions →

View source checks and pending reviews →

315 unique sources

154
281

Source counts represent unique URLs. A publication can support more than one guide. Guide citations, supplement sources and archived references are labeled separately for each use. Archived links open the guide’s review history; they do not establish its current permit answer. Review dates are shown on the relevant guide and do not guarantee a source has remained unchanged. Read our source policy →