I think that under the rules of the ICSID and the Canadian/Venezuelan agreement in force the company has to wait at least 6 months after the "triggering event" before bringing the action and if more than 2 years has elapsed since the "triggering event" then the window of opportunity to bring an action expires.

I suspect we will get into a legal minefield if there is any attempt to switch "events" to establish a variable time line. Time is usually the essence of the contract and fiddling while the clock runs on could be a very dangerous game...