Game concept
Province Administration
The game also links it as Province Administrations, Administration, Theme Administration, Theme Administrations, Circuit Administration.
From the game's encyclopedia
Each Province of a Bureaucratic Realm has a Province Administration, which may be set by the Liege and Governor to specialize the Province.
Only one Province Administration may be active per Province.
The game's text for patch 1.20.1.2. Words in blue are entries of the encyclopedia: hover one to read it, as in the game.
Province Administration is an entry of Crusader Kings III's in-game encyclopedia. The game explains it: "Each Province of a Bureaucratic Realm has a Province Administration, which may be set by the Liege and Governor to specialize the Province." It is part of Administrative. The game also links it as Province Administrations, Administration, Theme Administration, Theme Administrations and 1 more. Patch 1.20.1.2, from game/common/game_concepts/07_ep3_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.
Source: game/common/game_concepts/07_ep3_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.