Minn. Stat. § 48.21
Subd. 1. Specific restrictions.
(a) A bank may purchase, carry as an asset, and convey real estate only:
(b) Real estate acquired under paragraph (a), clauses (2) to (5), shall be carried as an asset only in accordance with rules the commissioner prescribes. The maximum period for holding other real estate as an asset shall be five years, provided that upon application to the commissioner, the commissioner may approve the possession of such real estate by a bank for a period longer than five years, but not to exceed an additional five years, if:
Subd. 2. Real estate holdings not bank liabilities.
Real estate owned by a bank as a result of actions authorized in subdivision 1, paragraph (a), clauses (2) to (5), and subsequently sold to any buyer on a contract for deed may not be considered creating a liability to a bank for purposes of section 48.24.
Subd. 3. Real estate holdings not sold; authority to write off.
Notwithstanding any rules of the commissioner to the contrary, if real estate owned by a bank pursuant to subdivision 1, paragraph (a), clauses (2) to (5), is not sold or otherwise disposed of within the maximum period, the bank may write off any remaining balance at a rate not less than one-fifth of that balance each subsequent calendar year.