File: Supply chain traceabilityEvidence checked 27 October 2026General information only
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The Custody File: identity, events, evidence
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Sources

The shelf the Custody File desk works from, in order of preference: primary legislation and regulator guidance first, standards bodies second, and reputable guidance third, never as a substitute for a primary source.

Each guide lists the sources for its own topic at the foot of the guide. A source listed on this page is not, by itself, the authority for every claim in every guide.