If action is to be taken with respect to any pension or retirement plan of the insurer, the proxy statement shall furnish the following information:

(1) A brief description of the material features of the plan, each class of persons who will participate in the plan, the approximate number of persons in each class, and the basis of participation;

(2) The approximate total amount necessary to fund the plan with respect to past services, the period over which that total amount is to be paid, and the estimated annual payments necessary to pay the total amount over that period, the estimated annual payment to be made, with respect to current ser-vices, and the amount of the annual payments to be made for the benefit of each director, nominee for director, and officer of the insurer, directors and officers as a group, and employees as a group;

(3) If the plan to be acted upon may be amended, other than by a vote of stockholders,, in a manner which would materially increase the cost of the plan to the insurer or to materially alter the allegation, of the benefits as between the groups specified in subsection (2) of this rule, the nature of such amendments.