Discharge Entrenched Regent

is_available = OR = {
	has_diarchy_parameter = dismissal_requires_gift
	AND = {
		has_diarchy_parameter = dismissal_requires_no_ministry
		tgp_has_access_to_ministry_trigger = no
	}
}
trigger_if = {
	limit = {
		is_ai = yes
	}
	has_active_diarchy = yes
	can_leave_diarchy_trigger = yes
	NOT = {
		has_character_flag = trying_to_dismiss_regent
	}
}
is_shown = scope:actor != scope:recipient
scope:actor = {
	diarch ?= scope:recipient
}

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

scope:actor = {
	can_leave_diarchy_trigger = yes
}
scope:actor = {
	NOT = {
		has_diarchy_active_parameter = regency_cant_be_ended_above_this_point
	}
}
trigger_if = {
	limit = {
		scope:actor = {
			is_ai = no
		}
	}
	custom_tooltip = {
		text = interactions_general.tt.must_select_one_option
		OR = {
			scope:diarchy_ending_gift_unnecessary = yes
			scope:diarchy_ending_gift_stiffed = yes
			scope:diarchy_ending_gift_hook = yes
			scope:diarchy_ending_gift_dynasty_prestige = yes
			scope:diarchy_ending_gift_piety = yes
			scope:diarchy_ending_gift_cash = yes
			scope:diarchy_ending_gift_herd = yes
		}
	}
}
custom_tooltip = {
	text = government_is_celestial_tt
	scope:actor = {
		tgp_has_access_to_ministry_trigger = no
	}
}
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
	}
	add_character_flag = trying_to_dismiss_regent
}
on_accept = scope:actor = {
	end_diarchy = yes
}
scope:recipient = {
	if = {
		limit = {
			scope:diarchy_ending_gift_unnecessary = yes
		}
		custom_tooltip = liege_dismiss_entrenched_regency_interaction.tt.no_gift_necessary
	}
	if = {
		limit = {
			scope:diarchy_ending_gift_stiffed = yes
		}
		custom_tooltip = liege_dismiss_entrenched_regency_interaction.tt.stiff_them
		if = {
			limit = {
				is_ai = yes
			}
			if = {
				limit = {
					has_trait = arrogant
				}
				add_opinion = {
					target = scope:actor
					modifier = insult_opinion
					opinion = -50
				}
			}
			else = {
				add_opinion = {
					target = scope:actor
					modifier = disappointed_opinion
					opinion = -30
				}
			}
		}
	}
	if = {
		limit = {
			scope:diarchy_ending_gift_hook = yes
		}
		add_hook = {
			type = favor_hook
			target = scope:actor
		}
		if = {
			limit = {
				is_ai = yes
			}
			if = {
				limit = {
					has_trait = deceitful
				}
				add_opinion = {
					target = scope:actor
					modifier = pleased_opinion
					opinion = 30
				}
			}
			else = {
				add_opinion = {
					target = scope:actor
					modifier = pleased_opinion
					opinion = 15
				}
			}
		}
	}
	if = {
		limit = {
			scope:diarchy_ending_gift_dynasty_prestige = yes
		}
		scope:actor = {
			add_prestige = minor_prestige_loss
		}
		custom_tooltip = liege_dismiss_entrenched_regency_interaction.tt.dynasty_receives_prestige
		hidden_effect = {
			dynasty = {
				add_dynasty_prestige = liege_dismiss_entrenched_regency_interaction_dynasty_prestige_value
			}
		}
		if = {
			limit = {
				is_ai = yes
			}
			if = {
				limit = {
					dynasty.dynast = scope:recipient
				}
				add_opinion = {
					target = scope:actor
					modifier = pleased_opinion
					opinion = 30
				}
			}
			else = {
				add_opinion = {
					target = scope:actor
					modifier = pleased_opinion
					opinion = 15
				}
			}
		}
	}
	if = {
		limit = {
			scope:diarchy_ending_gift_piety = yes
		}
		scope:actor = {
			add_piety = medium_piety_loss
		}
		add_piety = major_piety_value
		if = {
			limit = {
				is_ai = yes
			}
			if = {
				limit = {
					has_trait = zealous
				}
				add_opinion = {
					target = scope:actor
					modifier = pleased_opinion
					opinion = 30
				}
			}
			else = {
				add_opinion = {
					target = scope:actor
					modifier = pleased_opinion
					opinion = 15
				}
			}
		}
	}
	if = {
		limit = {
			scope:diarchy_ending_gift_cash = yes
		}
		scope:actor = {
			pay_short_term_gold = {
				target = scope:recipient
				gold = major_gold_value
			}
		}
		if = {
			limit = {
				is_ai = yes
			}
			if = {
				limit = {
					has_trait = greedy
				}
				add_opinion = {
					target = scope:actor
					modifier = pleased_opinion
					opinion = 30
				}
			}
			else = {
				add_opinion = {
					target = scope:actor
					modifier = pleased_opinion
					opinion = 15
				}
			}
		}
	}
	if = {
		limit = {
			scope:diarchy_ending_gift_herd = yes
		}
		scope:actor = {
			pay_herd = {
				target = scope:recipient
				value = domicile.ten_percent_herd_value
			}
		}
		if = {
			limit = {
				is_ai = yes
			}
			if = {
				limit = {
					has_trait = greedy
				}
				add_opinion = {
					target = scope:actor
					modifier = pleased_opinion
					opinion = 30
				}
			}
			else = {
				add_opinion = {
					target = scope:actor
					modifier = pleased_opinion
					opinion = 15
				}
			}
		}
	}
}
if = {
	limit = {
		always = scope:diarchy_ending_gift_unnecessary
	}
	scope:actor = {
		diarch_interaction_set_or_update_global_variable_effect = {
			VARIABLE = di_track_entr_unnecessary_accept
		}
		diarch_interaction_add_to_global_list_effect = {
			VARIABLE_LIST = di_track_entr_unnecessary_accept_actor_list
		}
	}
	scope:recipient = {
		diarch_interaction_add_to_global_list_effect = {
			VARIABLE_LIST = di_track_entr_unnecessary_accept_recipient_list
		}
	}
}
else_if = {
	limit = {
		always = scope:diarchy_ending_gift_stiffed
	}
	scope:actor = {
		diarch_interaction_set_or_update_global_variable_effect = {
			VARIABLE = di_track_entr_stiffed_accept
		}
		diarch_interaction_add_to_global_list_effect = {
			VARIABLE_LIST = di_track_entr_stiffed_accept_actor_list
		}
	}
	scope:recipient = {
		diarch_interaction_add_to_global_list_effect = {
			VARIABLE_LIST = di_track_entr_stiffed_accept_recipient_list
		}
	}
}
else_if = {
	limit = {
		always = scope:diarchy_ending_gift_hook
	}
	scope:actor = {
		diarch_interaction_set_or_update_global_variable_effect = {
			VARIABLE = di_track_entr_hook_accept
		}
		diarch_interaction_add_to_global_list_effect = {
			VARIABLE_LIST = di_track_entr_hook_accept_actor_list
		}
	}
	scope:recipient = {
		diarch_interaction_add_to_global_list_effect = {
			VARIABLE_LIST = di_track_entr_hook_accept_recipient_list
		}
	}
}
else_if = {
	limit = {
		always = scope:diarchy_ending_gift_dynasty_prestige
	}
	sco
# … (cut here; the rest is in the file)

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