402.20. For the purposes of sections 402.18 and 402.19, a qualifying employer of a pension plan is engaged exclusively in commercial activities throughout a claim period of a pension entity of the pension plan if(1) in the case of a qualifying employer that is a financial institution at any time in the claim period, all of the activities of the qualifying employer for the claim period are commercial activities; and
(2) in any other case, all or substantially all of the activities of the qualifying employer for the claim period are commercial activities.