mpo_de_jure_shifting_triggers

mpo_de_jure_shifting_triggers = {
	NOR = {
		target_is_de_jure_liege_or_above = root.primary_title
		any_de_jure_county_holder = {
			NOR = {
				root = { is_liege_or_above_of = prev }
				is_tributary_of_suzerain_or_above = root
				top_liege = {
					is_tributary_of_suzerain_or_above = root
				}
			}
		}
		any_de_jure_county = {
			NOT = {
				any_county_situation = {
					any_participant_group = {
						participant_group_type = nomad_rulers_capital
					}
				}
			}
		}
	}
	any_title_to_title_neighboring_$UPPER_TIER$ = {
		this = root.primary_title
	}
}

As written in game/common/scripted_triggers/mpo_scripted_triggers.txt.