They already have all the absolutely required information in various government systems. All we Canadians should need to do is file additional items if we have them. If we have nothing additional to file we shouldn't need to do anything.
I'm currently using Canadian based Wealthsimple.
Edit:
They'd also need to have a way to inform Canadians when they owe an amount and allow a period for us to confirm the information is all correct before the payment due date. Not sure how they'd put that into place. Can't always depend on Canada Post....
Either let him back on the air without any new restrictions OR you pay out his contract and remove any non competes so he can use his talent elsewhere.
Either let him back on the air without any new restrictions OR you pay out his contract and remove any non competes so he can use his talent elsewhere.