Game concept
Autonomous Vassals Crown Authority
The game also links it as Autonomous Vassals.
From the game's encyclopedia
'Autonomous Vassals' is the lowest level of Crown Authority. At this level, Vassals have no Opinion penalty toward their Liege, and the liege only has basic power over them.
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.
Autonomous Vassals Crown Authority is an entry of Crusader Kings III's in-game encyclopedia. The game explains it: "'Autonomous Vassals' is the lowest level of Crown Authority." It is part of Crown Authority. The game also links it as Autonomous Vassals. Patch 1.20.1.2, from game/common/game_concepts/00_game_concepts.txt and game/localization/english/game_concepts_l_english.yml.
Source: game/common/game_concepts/00_game_concepts.txt, game/localization/english/game_concepts_l_english.yml and the English localisation, Crusader Kings III 1.20.1.2.