Identity evidence validators

[jimfenton]

Transferred from #1915:

iii) you and I discussed Table 5-1 and I thought we had agreed wording to allow phrasing such as “demonstrate or show other reasonable expectation that the Issuing Source of the evidence” to allow that reasonable expectation to allow ready use of such sources as DMV-issued docs … but no erratum was provided. Oversight or change of mind?

As discussed there, correcting this items would involve a normative change to the wording and therefore can't be dealt with in errata (unlike the other sub-items in that issue).

[jimfenton]

A reasonable balance may be to accept confirmation by the Issuing Source and other trusted sources that can provide information that is traceable to the Issuing Source. An information provider that has a relationship with the Issuing Source would qualify, but one that does not have clear provenance for the information would not.