[rcxdude]

Can you spell it out further from that document? There's only one mention of zero-knowledge proofs in there, mentioning it as one thing that could be used in verification. The rest of the document is similarly simultaneously dense and vague, so it's really not obvious to me that the actual implementation will be cryptographically privacy-preserving.

[squidbeak]

I assume you mean the framework guidance. Bear in mind this is intended for Digital Verification Services. Cryptographic standards are referred to under 16.5. Zero Knowledge Proofs are a broader concept and better explained elsewhere, for instance

https://codethechange.stanford.edu/guides/guide_zk.html