If hereafter any dividend is paid or any premium refunded under any policy of group life insurance heretofore or hereafter issued, the excess, if any, of the aggregate dividends or premium refunds under such policy over the aggregate expenditures for insurance under such policy made from funds contributed by the policyholder, or by an employer of insured persons or by union or association to which such insured persons belong, including expenditures made in connection with the administration of such policy, shall be applied by the policyholder for the benefit of such insured employees generally or their dependents or insured members generally or their dependents. For the purpose
of this section and at the option of the policyholder, “policy” may include all group life and disability insurance policies of the policyholder.