All these okrugs (except for the Nenets Okrug) were divided into districts. In 1930, the okrugs were abolished, and the districts became directly subordinate to the Northern Krai. In 1936, according to the new Soviet Constitution, the Northern Krai was transformed into Northern Oblast. In 1937, Northern Oblast was split into Arkhangelsk Oblast and Vologda Oblast. In 1941, three districts of Arkhangelsk Oblast—Oparinsky, Lalsky, and Podosinovsky—were transferred to Kirov Oblast. During the attempted administrative reform in 1963, districts were subdivided into urban and rural districts. The reform was abandoned in 1965, and the division into districts was restored. On March 23, 1987, Solovetsky District was established, and in 2001, Novaya Zemlya obtained the district status.