Originally Posted by
WilcoRoger
What I meant is that a Swedish DL is a perfectly acceptable travel document between the NPU countries, whereas, say, a German or Louisiana one might or might not be, irrespective of the holder's nationality - I don't know.
I understood that, which is why I posted what I did.
The legal rights to movement (or even expedited naturalization) of NPU persons amongst the NPU countries are such that they are also applicable upon a queried reference to population registers coming back as showing the person to be a citizen of the claimed NPU country -- whether or not a recognized-state ID/passport is issued by an NPU country or even used. In practice this can lead to (or involve) some sort of bizarre circumstances/outcomes. Example involving dual US-Swedish citizens: a US passport is sometimes not acceptable as ID unless finding another person or two (even random local strangers) to attest to confirming that the person in front of the authority is the same as the person pictured in the US passport; then the US passport info may be used in connection with the population register reference for the person to exercise rights within the NPU.