… Revoke Title

is_available = trigger_if = {
	limit = {
		is_ai = yes
	}
	is_diarch = yes
	liege ?= {
		has_realm_law_flag = title_revocation_allowed
	}
	diarch_loyalty < diarch_loyalty_visibly_loyal_threshold
}
liege ?= {
	has_diarchy_parameter = unlock_diarch_revoke_title_interaction
}
OR = {
	is_designated_diarch = yes
	AND = {
		is_diarch_of_target = liege
		exists = liege
	}
}
is_shown = scope:actor != scope:recipient
scope:recipient = {
	liege ?= scope:actor.liege
	this != scope:actor.liege
	is_landed_or_landless_administrative_or_theocratic = yes
	scope:recipient.highest_held_title_tier >= tier_county
}

As written in game/common/character_interactions/00_diarch_interactions.txt.

title_revocation_standard_valid_showing_failures_only_trigger = yes
diarch_cannot_be_disabled_trigger = {
	DIARCH = scope:actor
}
scope:actor.liege = {
	trigger_if = {
		limit = {
			government_has_flag = government_is_tribal
		}
		custom_description = {
			text = liege_has_law_allowing_title_revocation_tribal
			has_realm_law_flag = title_revocation_allowed
		}
	}
	trigger_else_if = {
		limit = {
			government_has_mechanic = administrative
		}
		custom_description = {
			text = cannot_diarch_revoke_administrative_titles
			always = no
		}
	}
	trigger_else = {
		custom_description = {
			text = liege_has_law_allowing_title_revocation_crown
			has_realm_law_flag = title_revocation_allowed
		}
	}
}
trigger_if = {
	limit = {
		scope:recipient = {
			vassal_contract_has_flag = vassal_contract_cannot_revoke_titles
		}
	}
	custom_description = {
		text = liege_vassal_contract_forbids_revocation
		object = scope:recipient
		scope:recipient = {
			NOT = {
				vassal_contract_has_flag = vassal_contract_cannot_revoke_titles
			}
		}
	}
}
diarch_revocation_has_claim_check_trigger = yes
custom_tooltip = {
	text = diarch_interactions.tt.you_must_be_in_an_entrenched_regency_to_access
	scope:actor = {
		is_diarch = yes
	}
}
trigger_if = {
	limit = {
		scope:actor = {
			is_diarch = yes
		}
	}
	scope:actor.liege ?= {
		has_diarchy_active_parameter = unlock_diarch_revoke_title_interaction
	}
}
NOT = {
	scope:actor = {
		is_at_war_with = scope:actor.liege
	}
}
scope:actor != scope:intermediary
scope:actor = {
	custom_description = {
		text = character_interactions_hostile_actions_disabled_delay
		NOT = {
			has_character_flag = flag_hostile_actions_disabled_delay
		}
	}
}

As written in game/common/character_interactions/00_diarch_interactions.txt.

on_send = scope:actor = {
	add_character_flag = {
		flag = flag_hostile_actions_disabled_delay
		days = 10
	}
}
log_diarch_send_interaction_as_variable_effect = {
	INTERACTION = revoke
}
on_accept = scope:actor = {
	custom_tooltip = diarch_revoke_title_interaction.tt.gain_title
}
save_scope_value_as = {
	name = revoke_title_interaction
	value = yes
}
scope:actor = {
	trigger_event = char_interaction.0262
}
save_scope_value_as = {
	name = use_strife_not_tyranny
	value = yes
}
revoke_title_interaction_effect = yes
scope:actor = {
	clear_hostile_actions_lock_flag_effect = yes
}
hidden_effect = {
	scope:actor = {
		if = {
			limit = {
				is_landed_or_landless_administrative_or_theocratic = no
				scope:intermediary != scope:recipient
			}
			trigger_event = {
				id = diarchy.0141
				days = 1
			}
		}
	}
}
debug_log = debug_log.diarch_revoke_title.accepted
scope:actor = {
	diarch_interaction_set_or_update_global_variable_effect = {
		VARIABLE = di_track_revoke_accept
	}
	diarch_interaction_add_to_global_list_effect = {
		VARIABLE_LIST = di_track_revoke_accept_actor_list
	}
}
scope:recipient = {
	diarch_interaction_add_to_global_list_effect = {
		VARIABLE_LIST = di_track_revoke_accept_recipient_list
	}
}
scope:intermediary = {
	diarch_interaction_add_to_global_list_effect = {
		VARIABLE_LIST = di_track_revoke_accept_intermediary_list
	}
}
on_decline = scope:actor = {
	trigger_event = char_interaction.0263
	show_as_tooltip = {
		random_list = {
			50 = {
				show_chance = no
				desc = char_interaction.0263.result.criminal
				diarch_declare_recipient_criminal_effect = yes
			}
			50 = {
				show_chance = no
				desc = char_interaction.0263.result.war
				diarch_declare_claim_war_effect = yes
			}
		}
	}
	clear_hostile_actions_lock_flag_effect = yes
}
scope:recipient = {
	add_opinion = {
		target = scope:actor
		modifier = revoked_title
	}
}
debug_log = debug_log.diarch_revoke_title.rejected
scope:actor = {
	diarch_interaction_set_or_update_global_variable_effect = {
		VARIABLE = di_track_revoke_reject
	}
	diarch_interaction_add_to_global_list_effect = {
		VARIABLE_LIST = di_track_revoke_reject_actor_list
	}
}
scope:recipient = {
	diarch_interaction_add_to_global_list_effect = {
		VARIABLE_LIST = di_track_revoke_reject_recipient_list
	}
}
scope:intermediary = {
	diarch_interaction_add_to_global_list_effect = {
		VARIABLE_LIST = di_track_revoke_reject_intermediary_list
	}
}
on_auto_accept = scope:recipient = {
	trigger_event = char_interaction.0261
}

As written in game/common/character_interactions/00_diarch_interactions.txt.