This is an old - not maintained - article of the AEIOU.
In the Austria-Forum you find an updated version of this article in the new AEIOU.
Authorities, Provincial (Landesbehörden), Public Authority, the highest provincial authority which is in charge of the administration of the provinces is a collegiate body called Provincial Government, its executive authority is the Office of the Provincial Government. Provincial authorities of first instance are first and foremost the Bezirkshauptmannschaft; other provincial authorities are provincial land reform boards (Landesagrarsenate), agricultural authorities, and a number of administrative authorities not subject to directives, e.g. Verwaltungssenate (independent administrative authorities in the provinces). Bundesländer.