is_in_clan_trigger

The comment above it in the file

CLAN TRIGGERS ###

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_in_clan_trigger = {
	exists = house
	government_has_flag = government_is_clan
	top_liege = house.house_head
}