Minn. Stat. § 473.662

The earnings of the corporation shall be applied as follows: (a) to the payment of interest on its bonds and of any principal of such bonds which is due and payable; (b) to the establishment of a sufficient fund to pay interest and principal on its bonds which will be payable in the following fiscal year; and (c) to the other purposes set out in section 473.608, subdivision 13 . If the amount included in the budget for any year, including the sum necessary to make payment of interest on and principal of bonds in the ensuing fiscal year is not sufficient to meet the needs of the corporation for that year, any deficit shall be included in the budget of the corporation for the following year.