🌐UNCITRAL (United Nations Commission on International Trade Law)
Model Law on Electronic Commerce 1996 · Model Law on Electronic Signatures 2001
The UNCITRAL Model Law establishes the "functional equivalence" principle: an electronic record, so long as it fulfills the functions of writing, signature, and original, may not be denied legal effect merely because of its electronic form. It is the blueprint for the electronic-evidence legislation of 60+ countries worldwide.
✓ Note: AmberVouch's "fingerprint + timestamp + custody chain" is precisely the electronic substitute built on the functional-equivalence approach.