(1) Unless otherwise instructed, a collecting bank in a good faith effort to secure payment may, in the case of specific items and with or without the approval of any person involved, waive, modify or extend time limits imposed or permitted by this Act for a period not in excess of an additional banking day without discharge of secondary parties and without liability to its transferor or any prior party.(2) Delay by a collecting bank or payor bank beyond time limits prescribed or permitted by this Act or by instructions is excused if caused by interruption of communication facilities, suspension of payments by another bank, war, emergency conditions or other circumstances beyond the control of the bank provided it exercises such diligence as the circumstances require.