Except as may otherwise be provided in a bond resolution or trust indenture or loan or security agreement, in the event that the authority shall default in the payment of principal or interest on any of its bonds after the principal or interest falls due and that default shall continue for a period of 60 days or shall default in any other agreement with the bondholders or with a trustee under a trust indenture or loan or security agreement, the holders of 25% in aggregate principal amounts of the bonds then outstanding by instrument filed in the office of the Secretary of State duly acknowledged may appoint a trustee to represent the bondholders for the purpose provided in this section. The trustee may upon the written request of the holders of 25% in principal amount of the bonds then outstanding: [1981, c. 595, §3 (NEW).]