The undertaker must not commence the operation of any element of the specified work until the engineer has notified the undertaker that any related protective work has been completed to the engineer's reasonable satisfaction. The engineer's notification shall not be unreasonably withheld or delayed and in any event the engineer shall provide any comments within 1 month of the undertaker providing the plans of the protective work. If the engineer has made no comment within 3 weeks the undertaker may remind the engineer of this obligation and if the engineer makes no comments within 1 week of being reminded the engineer is to be deemed to have notified the undertaker that the protective work has been completed to the engineer's reasonable satisfaction.