Because the document contained promises and guarantees only by one party, Lithuanian historian Jūratė Kiaupienė concluded that the union could not have been a final international treaty and that there should have been another document finalizing the agreement.
Fordi dokumentets indhold kun er garanteret af den ene part, har den litauiske historiker Jurate Kiaupienė konkluderet, at foreningen ikke kunne have været en afsluttende international traktat, og at der burde have været et andet dokument til at færdiggøre aftalen.