Ask to Take Vows

is_available = trigger_if = {
	limit = {
		is_ai = yes
	}
	piety >= major_piety_value
	is_adult = yes
}
is_shown = scope:puppet_or_actor ?= {
	faith ?= {
		religious_head ?= scope:puppet_or_actor
		NOT = {
			any_faith_holy_order = {
				take_the_vows_valid_monastic_order_trigger = {
					CHARACTER = scope:puppet_or_actor
				}
			}
		}
	}
	take_vows_available_trigger = yes
	NOT = {
		any_learning_councillor = {
			this = scope:recipient
		}
	}
}
scope:recipient = {
	is_courtier_of = scope:puppet_or_actor
	NOR = {
		has_trait = devoted
		has_trait = order_member
	}
}

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

trigger_if = {
	limit = {
		scope:is_puppet_action ?= yes
	}
	scope:puppet_or_actor = {
		piety >= scope:recipient.ask_to_take_vows_piety_cost
	}
}
trigger_if = {
	limit = {
		scope:is_puppet_action ?= yes
	}
	scope:puppet_or_actor = {
		dynasty ?= {
			dynasty_prestige >= take_vows_dynasty_prestige_cost_value
		}
	}
}
scope:recipient = {
	age >= 10
	is_courtier_of = scope:puppet_or_actor
	can_take_religious_vows_trigger = yes
}
custom_tooltip = {
	text = cannot_take_overt_hostile_actions_against_diarch.tt
	NOT = {
		scope:recipient ?= scope:puppet_or_actor.diarch
	}
}
scope:puppet_or_actor = {
	NOT = {
		has_character_modifier = promised_pilgrimage_to_clergy_modifier
	}
}

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

on_send = scope:recipient = {
	set_variable = {
		name = vows_piety_spent
		value = ask_to_take_vows_piety_cost
		days = 10
	}
}
on_accept = if = {
	limit = {
		scope:is_puppet_action ?= yes
	}
	scope:puppet_or_actor = {
		add_piety = {
			value = {
				add = scope:recipient.ask_to_take_vows_piety_cost
				max = piety
				multiply = -1
			}
		}
		if = {
			limit = {
				take_vows_dynasty_prestige_cost_value > 0
			}
			dynasty ?= {
				add_dynasty_prestige = {
					value = {
						value = take_vows_dynasty_prestige_cost_value
						multiply = -1
					}
				}
			}
		}
	}
}
scope:puppet_or_actor = {
	if = {
		limit = {
			scope:hook = yes
		}
		use_hook = scope:recipient
	}
	if = {
		limit = {
			scope:demand = yes
		}
		scope:puppet_or_actor = {
			show_as_tooltip = {
				take_vows_demand_effect = yes
			}
		}
	}
	if = {
		limit = {
			has_legitimacy = yes
			scope:recipient = {
				is_primary_heir_of = scope:puppet_or_actor
			}
		}
		if = {
			limit = {
				hyperdulia_take_the_vows_trigger = yes
			}
			add_legitimacy = {
				value = miniscule_legitimacy_gain
				multiply = scope:puppet_or_actor.primary_title.tier
			}
		}
		else = {
			add_legitimacy = {
				value = minor_legitimacy_loss
				multiply = scope:puppet_or_actor.primary_title.tier
			}
		}
	}
	else_if = {
		limit = {
			has_legitimacy = yes
			scope:recipient = {
				is_heir_of = scope:puppet_or_actor
			}
		}
		if = {
			limit = {
				hyperdulia_take_the_vows_trigger = yes
			}
			add_legitimacy = {
				value = minor_legitimacy_gain
				multiply = scope:puppet_or_actor.primary_title.tier
			}
		}
		else = {
			add_legitimacy = {
				value = miniscule_legitimacy_loss
				multiply = scope:puppet_or_actor.primary_title.tier
			}
		}
	}
	else_if = {
		limit = {
			has_legitimacy = yes
			hyperdulia_take_the_vows_trigger = yes
		}
		add_legitimacy = {
			value = medium_legitimacy_gain
			multiply = scope:puppet_or_actor.primary_title.tier
		}
	}
	if = {
		limit = {
			scope:simony_paid_vows = yes
		}
		scope:recipient = {
			add_character_flag = {
				flag = pam_simony_paid_vows
				days = 1
			}
		}
	}
	show_as_tooltip = {
		send_child_to_clergy_effect = yes
	}
	scope:recipient = {
		if = {
			limit = {
				scope:puppet_or_actor.top_liege = {
					any_vassal_or_below = {
						government_has_flag = government_is_theocracy
						primary_title.tier > tier_barony
						faith = scope:puppet_or_actor.faith
					}
				}
			}
			scope:puppet_or_actor.top_liege = {
				random_vassal_or_below = {
					limit = {
						government_has_flag = government_is_theocracy
						primary_title.tier > tier_barony
						faith = scope:puppet_or_actor.faith
					}
					save_scope_as = theocratic_travel_target
				}
			}
			scope:theocratic_travel_target = {
				add_courtier = scope:recipient
			}
		}
		else_if = {
			limit = {
				exists = scope:puppet_or_actor.capital_province
			}
			move_to_pool_at = scope:puppet_or_actor.capital_province
		}
		kick_from_court_interaction_warning_tooltip_effect = yes
	}
	trigger_event = holy_order.0002
	take_vows_faith_opinion_effect = yes
	if = {
		limit = {
			house = {
				has_house_aspiration_parameter = humility_take_the_vows_bonus
			}
		}
		add_piety_experience = 100
		add_character_modifier = {
			modifier = tgp_humility_take_the_vows_bonus_modifier
			years = 10
		}
	}
}
hidden_effect = {
	scope:recipient = {
		remove_variable = vows_piety_spent
	}
}
add_clan_unity_interaction_effect = {
	CHARACTER = scope:puppet_or_actor
	TARGET = scope:recipient
	VALUE = minor_unity_gain
	DESC = clan_unity_take_vows.desc
	REVERSE_NON_HOUSE_TARGET = no
}
on_decline = scope:puppet_or_actor = {
	if = {
		limit = {
			scope:demand = yes
		}
		scope:puppet_or_actor = {
			show_as_tooltip = {
				take_vows_demand_effect = yes
			}
		}
	}
}
scope:recipient = {
	add_opinion = {
		target = scope:puppet_or_actor
		modifier = asked_me_to_take_vows_opinion
		years = 10
	}
}
scope:puppet_or_actor = {
	trigger_event = {
		id = religious_interaction.1031
	}
}
show_as_tooltip = {
	scope:puppet_or_actor = {
		add_piety_no_experience = {
			value = scope:recipient.ask_to_take_vows_piety_cost
		}
	}
}
hidden_effect = {
	if = {
		limit = {
			scope:recipient = {
				has_variable = vows_piety_spent
			}
		}
		scope:puppet_or_actor = {
			add_piety_no_experience = {
				value = scope:recipient.var:vows_piety_spent
			}
		}
		scope:recipient = {
			remove_variable = vows_piety_spent
		}
	}
}
add_clan_unity_interaction_effect = {
	CHARACTER = scope:puppet_or_actor
	TARGET = scope:recipient
	VALUE = minor_unity_loss
	DESC = clan_unity_refused_to_take_vows.desc
	REVERSE_NON_HOUSE_TARGET = no
}

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