Open Rulebook

Browse the product-specific rules of origin the engine applies, with the official text, the structured rule, who reviewed it and when, and its version history.

Official text in English and, where the source provides it, in French; the source publishes no Spanish text. The interface is in English, French and Spanish.

Edition of the Harmonized System: the product-specific rules of CUSMA Annex 4-B were written against the 2012 edition (HS 2012). This release applies them to codes of today’s tariffs, which follow the 2022 edition (HS 2022), without transposing them (open question OPEN-06). Where a code was created, split or renumbered after 2012, check the rule against the official text.

An HS code may be typed with or without dots (8471.30 or 847130). The rules name goods by code, so a word finds rules whose own text contains it.

3090 rules in release cusma-annex4b-2026-11-r5 · Download the release (JSON) · API

This release does not carry 62 provisions of Annex 4-B; search by code to see the ones that concern a good.