A municipality may, from the proceeds of bonds, investment earnings, or any other available money of the municipality, pay to the United States or an officer, department, agency or instrumentality of the United States a rebate of excess earnings payment required by federal law to maintain the interest as tax exempt. A covenant to make a payment or payments pursuant to this subdivision is not an obligation of the municipality as defined in section 475.51, subdivision 3.
A municipality that issues obligations it intends to be exempt from federal income taxation may agree to prepay or purchase the obligations (a) at the time and in the amount it determines necessary or desirable to maintain the obligations as exempt from federal income taxation or (b) upon a determination that the obligations are taxable. A municipality may make arrangements to have money available with which to purchase or prepay the obligations as the municipality determines necessary or desirable. If arrangements are made with a financial institution pursuant to section 475.54, subdivision 5a or this subdivision and if the municipality owes the financial institution money under the arrangement, the agreement to pay the financial institution is not an obligation of the municipality as defined in section 475.51, subdivision 3, unless and until the amount to be paid or reimbursed is determined and becomes due and payable, whereupon, the obligation is, as provided by the agreement, a general or special obligation of the municipality, and may also be paid from the proceeds of refunding bonds issued pursuant to this chapter. The agreement may not be or become a general obligation of the municipality unless the underlying, originally issued obligation was a general obligation of the municipality. For purposes of section 475.61, subdivisions 1 and 3, money necessary to make the purchase or prepayment are not amounts needed to meet when due principal and interest payments on the obligations.
This section is, in part, remedial in nature. Obligations issued prior to March 26, 1986 are not invalid or unenforceable for providing terms, consequences or remedies that are authorized by this section.
Minn. Stat. § 475.561
1986 c 465 art 2 s 22