Where an order is made in relation to the member spouse's retirement benefit and the member spouse dies prior to commencement of the designated benefit, the amount of any contingent benefit payable in respect of the member spouse in accordance with the rules of the same pension scheme shall be reduced by the amount of the payment made under the order in accordance with article 40 on a basis which an actuary has approved as being consistent with the appropriate guidelines issued by the Society of Actuaries in Ireland.