can_be_commander_basic_trigger

The comment above it in the file

If you update one of the available triggers, update all of them. It's a lot better for performance to not have scripted triggers within scripted triggers when they're checked as often as these ones are.

What it checks

• the game's own tooltip text · ◦ our reading of the script line · code the script where neither exists

“They” is whatever it runs on (the scope it is called in). The scripted triggers and effects it calls link to their own pages; $PARAMETERS$ stay as written: each call fills them in.

can_be_commander_basic_trigger = {
	is_available_quick = {
		alive = yes
		adult = yes
		incapable = no
		hostage = no
	}

	OR = { # You can always lead your own armies
		this = $ARMY_OWNER$
		can_be_combatant_based_on_gender_trigger = { ARMY_OWNER = $ARMY_OWNER$ }
	}

	trigger_if = {
		limit = { $ARMY_OWNER$ = { is_ai = yes } }
		is_ai = yes
		highest_held_title_tier < tier_hegemony
	}
}