pam_investiture_council_force_gather_effect

pam_investiture_council_force_gather_effect = {
	scope:host.faith = {
		every_faith_character = {
			# We leave landless clergy to the normal invitation so they do not fill the guest list
			limit = {
				this != scope:host
				is_ai = yes
				is_adult = yes
				is_healthy = yes
				NOT = { government_has_flag = government_is_republic }
				NOT = { government_has_flag = government_is_landless_adventurer }
				NOT = { government_has_flag = government_is_mercenary }
				OR = {
					# Landed county+ prelates (see the trigger), heads of rite, and committed kowtow / CB voters.
					pam_is_investiture_landed_prelate_trigger = yes
					rite.head_of_rite ?= this
					has_variable = investiture_stance
				}
			}
			# is_available_adult excludes anyone already here, and adding an invitee mid-acceptance errors
			pam_investiture_free_for_council_effect = yes
			save_temporary_scope_as = investiture_gather_char
			if = {
				limit = {
					is_available_adult = yes
					NOT = {
						scope:activity = {
							any_invited_character = { this = scope:investiture_gather_char }
						}
					}
				}
				add_to_activity = scope:activity
			}
		}
	}
}

As written in game/common/scripted_effects/pam_investiture_council_effects.txt.