Product-specific rules of preferential origin

What are product-specific rules of preferential origin?

Product-specific rules (PSRs) of preferential origin determine requirements of working or processing which must be done on non-originating materials in order for the product manufactured to obtain originating status.

The list of PSRs is usually set out in an annex to a free trade agreement, e.g. Annex 3 "Product-specific rules of origin" to the EU-UK Trade and Cooperation Agreement.

PSRs are part of the rules of preferential origin, see picture below. 

What is a practical example?

For example, the PSR for the cane sugar (HS heading 17.01), set out in the EU-UK trade and cooperation agreement, is CTH. ‘CTH’ means that any non-originating material used in the production of the product must be classified in a heading other than that of the product. See a more detailed explanation Origin criterion: change in tariff classification.

What are the rules of preferential origin?