Paragraph 6 I1

The engineer’s approval under paragraph 5 above shall not be unreasonably withheld and any question of whether it has been unreasonably withheld shall be settled by arbitration, and in any event if within 56 days after such plans have been furnished to LUL the engineer has not notified his disapproval of those plans and the grounds of his disapproval, he shall be deemed to have approved the plans as submitted.