In lieu of the appointment of a board of trustees of its endowment care fund, any cemetery authority may appoint as sole trustee of its endowment care fund any bank or trust company qualified under the provisions of the Banking Law (Division 1 (commencing with Section 99) of the Financial Code) to engage in the trust business. If a cemetery authority appoints a bank or trust company, the sum paid to the bank or trust company may exceed 5 percent of the net income derived from the endowment care fund, or special care fund, or both, notwithstanding Section 8733.