Minn. Stat. § 475.74: LAW LIMITING TAXES NOT APPLICABLE.

The provisions of any law limiting taxes shall not limit the power of any city of the first or second class or any independent school district in any city of the first class, or any special school district in a city of the second class having a population of not less than 28,000 nor more than 32,000 according to the 1950 federal census, to levy taxes to pay its general obligation bonds nor shall such provisions limit the power of any municipality to levy taxes to make good any deficiency in any prior levies made pursuant to section 475.61. The governing body shall levy such taxes without limitation as to rate or amount.