The traditional division of the country into counties was abolished in the 1920s when the Kingdom of Serbs, Croats and Slovenes and the subsequent Kingdom of Yugoslavia introduced oblasts and banovinas respectively. Communist-ruled Croatia, as a constituent part of post-World War II Yugoslavia, abolished earlier divisions and introduced municipalities, subdividing Croatia into approximately one hundred municipalities. Counties were reintroduced in 1992 legislation, significantly altered in terms of territory relative to the pre-1920s subdivisions. In 1918, the Transleithanian part of Croatia was divided into eight counties with their seats in Bjelovar, Gospić, Ogulin, Osijek, Požega, Varaždin, Vukovar, and Zagreb, and the 1992 legislation established 14 counties in the same territory. Since the counties were re-established in 1992, Croatia is divided into 20 counties and the capital city of Zagreb, the latter having the authority and legal status of a county and a city at the same time. Borders of the counties changed in some instances since, with the latest revision taking place in 2006. The counties subdivide into 127 cities and 429 municipalities. Nomenclature of Territorial Units for Statistics (NUTS) division of Croatia is performed in several tiers. NUTS 1 level places the entire country in a single unit, while there are three NUTS 2 regions. Those are Northwest Croatia, Central and Eastern (Pannonian) Croatia, and Adriatic Croatia. The latter encompasses all the counties along the Adriatic coast. Northwest Croatia includes Koprivnica-Križevci, Krapina-Zagorje, Međimurje, Varaždin, the city of Zagreb, and Zagreb counties and the Central and Eastern (Pannonian) Croatia includes the remaining areas—Bjelovar-Bilogora, Brod-Posavina, Karlovac, Osijek-Baranja, Požega-Slavonia, Sisak-Moslavina, Virovitica-Podravina, and Vukovar-Syrmia counties. Individual counties and the city of Zagreb also represent NUTS 3 level subdivision units in Croatia. The NUTS Local administrative unit divisions are two-tiered. LAU 1 divisions match the counties and the city of Zagreb in effect making those the same as NUTS 3 units, while LAU 2 subdivisions correspond to the cities and municipalities of Croatia.