297. Any pension postponed before 1 April 1982 or between 1 April 1982 and 1 January 1990 shall be adjusted in such a manner as to ensure that the pension payable at the end of the postponement is actuarially equivalent, in the former case, to the pension the payment of which would have begun on 1 April 1982 had the pension not been postponed and, in the latter case, to the pension the payment of which would have begun on the date on which the member would have attained normal retirement age had the pension not been postponed.
Such adjustment must not create only surpluses in the pension fund of the plan nor must it create only unfunded liabilities.