Commencing in calendar year 1988, the principal and interest of such loan amounts shall be repaid in payments payable annually in the month of March over a period of 15 years. The repayment amounts shall be recomputed each year to reflect the interest rate prescribed by K.S.A. 75-3679 and shall be calculated each year on a substantially level payment basis based on a total original amortization period of 15 years.
K.S.A. 75-3680