4. Real estate acquired by a bank or trust company, other than that acquired for use as a place of business, shall be entered on the books of the bank or trust company in conformity with the method of accounting for troubled debt restructurings approved by the financial accounting standards boards or such other method of accounting as may be authorized or required by rules and regulations of the superintendent of financial services. The provisions of this subdivision shall not, except as the superintendent may otherwise require, apply to any parcel of real estate as to which the bank or trust company has exercised its option to transfer or convey such real estate to the veterans administration or the federal housing commissioner pursuant to insurance or guaranty.