is_valid_grand_wedding_special_guest_trigger

The comment above it in the file

OTHER_SPOUSE = the other spouse character, may be invalid object

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.

is_valid_grand_wedding_special_guest_trigger = {
	is_alive = yes
	is_adult = yes
	# Must be able to marry the other character if they are selected
	trigger_if = {
		limit = { exists = $OTHER_SPOUSE$ }
		can_marry_character_trigger = { CHARACTER = $OTHER_SPOUSE$ }
	}
}