allows_declaring_war_against_target_trigger

allows_declaring_war_against_target_trigger = {
	save_temporary_scope_as = attacker_check
	$TARGET$ = { save_temporary_scope_as = defender_check }
	custom_tooltip = {
		text = sworn_peace_tt
		NOT = { has_character_flag = sworn_peace }
	}
	is_incapable = no
	trigger_if = {
		limit = {
			NOT = {
				has_cb_on = {
					target = scope:defender_check
					casus_belli = pam_humiliation_cb
				}
			}
		}
		can_attack_in_hierarchy = scope:defender_check
	}
	trigger_if = {
		limit = {
			NOT = {
				government_has_flag = can_start_war_with_raised_troops
			}
		}
		has_raised_armies = no
	}
	trigger_else = {
		custom_description = {
			text = army_blocks_defender_army
			NOT = {
				any_army = {
					location.county.holder ?= {
						target_is_same_character_or_above = scope:defender_check
					}
				}
			}
		}
	}
	NOT = {
		is_allied_in_war = scope:defender_check
	}
	custom_description = {
		text = "is_not_bankrupt"
		is_in_debt = no
	}
	is_in_activity = no
	trigger_if = {
		limit = {
			culture = { has_cultural_parameter = cannot_attack_allies }
		}
		NOT = {
			is_allied_to = scope:defender_check
		}
	}
	trigger_if = {
		limit = {
			culture = { has_cultural_parameter = cannot_attack_truces }
		}
		NOT = {
			has_truce = scope:defender_check
		}
	}
	is_imprisoned = no
	trigger_if = {
		limit = {
			has_variable_list = subjugation_offer_under_consideration
		}
		custom_description = {
			text = is_not_considering_offer_of_subjugation
			NOT = {
				is_target_in_variable_list = {
					name = subjugation_offer_under_consideration
					target = scope:defender_check
				}
			}
		}
	}
	scope:defender_check = {
		custom_tooltip = {
			text = is_a_herder_recipient_tt
			NOT = { government_has_flag = government_is_herder } # herders can't fight
		}
		NOT = { is_tributary_of_suzerain_or_above = scope:attacker_check } # can't fight your tributaries or your tributaries' tributaries
		NOT = { has_strong_hook = scope:attacker_check }
		trigger_if = {
			limit = { is_imprisoned = yes }
			custom_tooltip = {
				text = declare_war_target_is_your_prisoner_tt
				imprisoner != scope:attacker_check
			}
		}
	}
	trigger_if = {
		limit = { liege != this }
		trigger_if = {
			limit = {
				government_has_mechanic = administrative
			}
			# internal war
			trigger_if = {
				limit = { top_liege = scope:defender_check.top_liege }
				trigger_if = {
					limit = {
						scope:defender_check = { government_has_mechanic = administrative }
						top_liege != scope:defender_check
					}
					custom_tooltip = {
						text = admin_cannot_declare_internal_wars
						always = no
					}
				}
			}
			trigger_else = {
				trigger_if = { # Admin - Laws prevent all vassals from declaring war
					limit = {
						top_liege = {
							has_realm_law_flag = admin_vassal_wars_banned
						}
					}

As written in game/common/scripted_triggers/00_war_and_peace_triggers.txt.