Request Contract Change

is_shown = scope:puppet_or_actor = {
	is_independent_ruler = no
	this != scope:recipient
	liege ?= scope:recipient
	is_tributary = no
	vassal_contract_has_modifiable_obligations = yes
	government_has_flag = government_is_nomadic
}

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

NOT = {
	scope:recipient = {
		is_at_war_with = scope:puppet_or_actor
	}
}
trigger_if = {
	limit = {
		scope:puppet_or_actor = {
			subject_contract_is_blocked_from_modification = yes
		}
	}
	scope:puppet_or_actor = {
		subject_contract_is_blocked_from_modification = no
	}
}
trigger_else = {
	trigger_if = {
		limit = {
			scope:puppet_or_actor = {
				has_variable = vassal_modify_contract_cooldown
			}
		}
		custom_tooltip = {
			text = vassal_modify_contract_cooldown_desc
			scope:puppet_or_actor = {
				NOT = {
					has_variable = vassal_modify_contract_cooldown
				}
			}
		}
	}
	trigger_else = {
		custom_tooltip = {
			text = nomad_contract_request_cooldown_desc
			scope:puppet_or_actor = {
				NOT = {
					has_variable = nomad_contract_request_cooldown
				}
			}
		}
	}
	scope:puppet_or_actor = {
		has_changed_contract_obligation_trigger = yes
	}
	scope:puppet_or_actor = {
		trigger_if = {
			limit = {
				count_obligation_improvements_for_vassal_include_hook >= 0
			}
			custom_description = {
				text = vassal_modify_vassal_contract_cannot_increase_obligation_level
				object = scope:recipient
				value = count_obligation_improvements_for_vassal_include_hook
				count_obligation_improvements_for_vassal_include_hook = 0
			}
		}
		custom_description = {
			text = vassal_modify_vassal_contract_obligation_change_limit
			value = list_size:changed_obligations
			list_size:changed_obligations <= max_contract_changes
		}
	}
}

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

on_accept = scope:puppet_or_actor = {
	send_interface_message = {
		type = msg_vassal_contract_change
		title = modify_vassal_contract_interaction_notification
		right_icon = scope:recipient
		if = {
			limit = {
				always = scope:hook
			}
			use_hook = scope:recipient
			add_achievement_flag_effect = {
				FLAG = achievement_fine_print_flag
			}
		}
		hidden_effect = {
			set_variable = {
				name = vassal_modify_contract_cooldown
				value = yes
				years = vassal_modify_contract_cooldown_value
			}
		}
		hidden_effect = {
			set_subject_contract_modification_blocked = yes
		}
		every_in_list = {
			list = changed_obligations
			save_scope_as = obligation
			scope:puppet_or_actor = {
				vassal_contract_set_obligation_level = {
					type = scope:obligation.vassal_contract_type
					level = scope:obligation
				}
			}
		}
	}
}
diarch_changed_own_contract_effect = yes
scope:puppet_or_actor = {
	additional_flavor_check_effect = yes
}
on_decline = hidden_effect = {
	scope:puppet_or_actor = {
		set_variable = {
			name = nomad_contract_request_cooldown
			value = yes
			years = vassal_modify_contract_cooldown_value
		}
	}
}

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