http://lod.ehri-project-test.eu/institutions/pl-003087/mandates/1 an entity of type: Mandate
Nowadays the branch of Białystok State Archive in Łomża works on the ground of the Act on National Archival Records and Archives of July 14, 1983, Journal of Law, (Dziennik Ustaw) No 38, 1983.07.19 with later changes.