A loan established under AS 44.33.650 - 44.33.690
(1) may not exceed a term of 10 years, except for extensions under AS 44.33.660;
(2) may not bear interest less than four percent per year;
(3) must be secured by collateral acceptable to the department; and
(4) may not exceed 80 percent of the cost of the eligible capstone avionics equipment purchased with proceeds of the loan.