The legislation is fairly broad in terms of the wording.
Part of the reason, of course, is that if it were overly prescriptive, it can become very difficult to administer afterwards.
The objective at the end of the day is to give enough flexibility, but to make sure there are some clear limitations in terms of those exceptions so that they couldn't be abused and that employees would benefit from protections.
I should probably add, as well, that there will also be regulation-making powers added as part of this. If needed, there may be a possibility, through regulations, to further specify the circumstances that are subject to exceptions or not.