Bringing this here as the Github issue has been locked for non-collaborators.
@DeepDiver1975: You said:
There is only one field in the vcard: address.
We either add an address or we don't.
There is no separate Po Box field
There is a place for the PO Box. The
ADR line includes seven, semicolon separated components, the first of which is the PO Box. You already referenced RFC 6350 section 6.3.1in the Github issue, which specifies the format.