tgp_silk_road_downstream_player_sub_region_effect

tgp_silk_road_downstream_player_sub_region_effect = {
	save_temporary_scope_as = player_temp
	scope:origin_sub_region_temp = { 
		if = {
			limit = { any_situation_sub_region_participant = { this = scope:player_temp } }
			save_temporary_scope_as = player_sub_region_temp
		}
	}
	if = {
		limit = { NOT = { exists = scope:player_sub_region_temp } }
		random_in_list = {
			list = second_sub_regions
			limit = { any_situation_sub_region_participant = { this = scope:player_temp } }
			save_temporary_scope_as = player_sub_region_temp
		}
	}
	if = {
		limit = { NOT = { exists = scope:player_sub_region_temp } }
		random_in_list = {
			list = third_sub_regions
			limit = { any_situation_sub_region_participant = { this = scope:player_temp } }
			save_temporary_scope_as = player_sub_region_temp
		}
	}
}

As written in game/common/scripted_effects/10_dlc_tgp_silk_road_scripted_effects.txt.