Notwithstanding section 12B.10, a perpetual care cemetery owned by a governmental subdivision may invest and reinvest deposits pursuant to the requirements of this chapter. The trustee shall use the judgment and care under the circumstances then prevailing that persons of prudence, discretion, and intelligence exercise in the management of their own affairs, not in regard to speculation but in regard to the permanent disposition of their funds, considering the probable income as well as the probable safety of their capital. The trustee of the trust funds has a fiduciary duty to make reasonable investment decisions and to properly oversee and manage the funds entrusted to the trust fund.