Neither any order by EGAT for payment of money, or any payment for, or acceptance of, the whole or any part of the work by EGAT, nor any extension of time, nor any possession taken by egat or its employees, shall operate as a waiver of any provision of this contract or of any power herein reserved to EGAT or any right to damages herein provided, nor shall any waiver of any breach in this contract be held to be a waiver of any other or subsequent breach.