pam_investiture_prepare_voters_effect

pam_investiture_prepare_voters_effect = {
	every_faith_character = {
		limit = {
			pam_valid_ecumenical_council_voter_trigger = yes
			NOT = { this = faith.religious_head }
		}
		if = {
			limit = { is_ai = yes }
			pam_investiture_free_for_council_effect = yes
			# Inside location = { } faith.religious_head is the province
			if = {
				limit = {
					exists = scope:investiture_hof_capital
					location ?= { squared_distance = { target = scope:investiture_hof_capital value > squared_distance_large } }
				}
				return_home = yes
			}
		}
		else = {
			if = {
				limit = {
					OR = {
						is_travelling = yes
						exists = involved_activity
					}
				}
				trigger_event = pam_investiture_council_events.0004
			}
		}
	}
}

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