Good question.
I think the obligation is on the Contractor to notified if he believes the matter to be a compensation event so presumably it is within 8 weeks of becoming aware that a matter he believes is a compensation event happened. It is up to the PM to decide if the matter is a CE.
The provision is to notify in the belief that it is a CE, if the PM decides otherwise the notification was still valid so arguable there is provision to notify for an event which is not a CE.
I think the obligation is on the Contractor to notified if he believes the matter to be a compensation event so presumably it is within 8 weeks of becoming aware that a matter he believes is a compensation event happened. It is up to the PM to decide if the matter is a CE.
The provision is to notify in the belief that it is a CE, if the PM decides otherwise the notification was still valid so arguable there is provision to notify for an event which is not a CE.