N.D. Cent. Code § 15-39.1-10.1

Every person receiving monthly benefits from the fund on an account on which benefits were being paid on June 30, 1983, shall receive an increase in benefits beginning July 1, 1983, equal to fifteen percent of the person's present annuity. The percentage must be adjusted, if necessary, so that the maximum increase would be no more than forty-five dollars per month. The fifteen percent increase in benefits must be adjusted in percentage so that no person receives less than one dollar per month per year of teaching credit.