Leslie - you are correct that there is no time bar on the Contractor notifying compensation events that the Project Manager was obliged to notify. However, 61.3 emphasizes that the Contractor can notify these in the PM has not, which will then speed up the process of agreeing it is one, quotation, assessment and implementation. Until the event is “implemented” it can not change the Prices (target) so the Contractor will not know where they stand with this event. therefore it is in their interest to notify any events they believe to be one, even for one the PM is obliged. They have nothing to gain by not notifying it themselves. (To emphasise again they are not time barred on these ones, but they will be no doubt more subjective to assess if they only notify at the end of the job.)