In section 48 of the regulations, the wording you have is that the minister must pay a rebate in respect of fuel or combustible waste in a listed province to a person of a prescribed class or a person meeting prescribed conditions in the amount determined in a prescribed manner if prescribed circumstances exist or prescribed conditions are met.
That's the catch-all term to mean that even if there is a disagreement between the federal and provincial governments over how the rebate works, they could impose one. That's just the law. I'm not saying that the government would do that.
Does the law give the federal government the ability to overrule the provincial government in the rebating system if it so desires?