Appoint Vizier

is_available = government_has_flag = may_appoint_viziers
NOT = {
	has_diarchy_active_parameter = diarchy_is_vizierate
}
is_shown = trigger_if = {
	limit = {
		exists = scope:secondary_recipient
	}
	scope:secondary_recipient = {
		is_valid_basic_candidate_for_vizier_trigger = yes
		OR = {
			is_courtier_of = scope:actor
			AND = {
				highest_held_title_tier = tier_barony
				liege ?= scope:actor
			}
		}
	}
}
trigger_else = {
	scope:recipient = {
		this = scope:actor
	}
}

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

scope:actor = {
	has_active_diarchy = no
}
custom_tooltip = {
	text = appoint_vizier_interaction.tt.duchy_or_more
	scope:actor.highest_held_title_tier >= tier_duchy
}
scope:actor = {
	is_available_at_peace = yes
}
scope:actor = {
	NOT = {
		has_character_modifier = civil_service_in_chaos_modifier
	}
}

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

on_accept = scope:actor = {
	custom_tooltip = {
		text = appoint_vizier_interaction.tt.enter_vizierate_with_secondary_recipient
		try_start_diarchy = vizierate
		if = {
			limit = {
				NOT = {
					exists = scope:ai_recipient
				}
			}
			set_diarch = scope:secondary_recipient
		}
		else = {
			set_diarch = scope:ai_recipient
		}
	}
	if = {
		limit = {
			exists = scope:ai_recipient
		}
		scope:ai_recipient = {
			add_opinion = {
				target = scope:actor
				modifier = compliment_opinion
				opinion = 30
			}
			stress_and_fulfillment_impact = {
				ambitious = minor_stress_impact_loss
				arrogant = minor_stress_impact_loss
				lazy = major_stress_impact_gain
			}
		}
	}
	else = {
		scope:secondary_recipient = {
			add_opinion = {
				target = scope:actor
				modifier = compliment_opinion
				opinion = 30
			}
			stress_and_fulfillment_impact = {
				ambitious = minor_stress_impact_loss
				arrogant = minor_stress_impact_loss
				lazy = major_stress_impact_gain
			}
		}
	}
	custom_tooltip = appoint_vizier_interaction.tt.secondary_recipient_grants_tax_jurisdictions
	if = {
		limit = {
			is_ai = no
		}
		sort_vizier_candidates_to_list_effect = yes
		ordered_in_list = {
			list = characters
			order_by = diarchy_vizier_succession_score_value
			save_scope_as = best_candidate
		}
		if = {
			limit = {
				scope:secondary_recipient != scope:best_candidate
			}
			custom_tooltip = appoint_vizier_interaction.tt.secondary_recipient_is_not_best_candidate
			add_character_modifier = {
				modifier = civil_service_upset_modifier
				years = 10
			}
		}
	}
	if = {
		limit = {
			exists = scope:secondary_recipient.house
			house ?= scope:secondary_recipient.house
		}
		custom_tooltip = appoint_vizier_interaction.tt.same_house_penalty
	}
	designated_diarch ?= {
		if = {
			limit = {
				this != scope:secondary_recipient
			}
			add_opinion = {
				target = scope:actor
				modifier = appointed_vizier_over_designated_regent_opinion
				opinion = -40
			}
		}
	}
	set_variable = {
		name = my_vizier
		value = scope:recipient
	}
	stress_and_fulfillment_impact = {
		trusting = massive_stress_impact_loss
		lazy = major_stress_impact_loss
		paranoid = minor_stress_impact_gain
		diligent = minor_stress_impact_gain
	}
}
scope:secondary_recipient = {
	if = {
		limit = {
			is_councillor = yes
		}
		custom_tooltip = appoint_vizier_interaction.tt.warning.vizier_replace_councillor
	}
}
scope:actor = {
	diarch_interaction_set_or_update_global_variable_effect = {
		VARIABLE = di_track_appviz_accept
	}
	diarch_interaction_add_to_global_list_effect = {
		VARIABLE_LIST = di_track_appviz_accept_actor_list
	}
}
scope:recipient = {
	diarch_interaction_add_to_global_list_effect = {
		VARIABLE_LIST = di_track_appviz_accept_recipient_list
	}
}

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