There's a rebate for fuel removed from the listed province. There's a rebate for fuel brought to a covered facility. There's a rebate for fuel used in a non-covered activity. There's a rebate for net fuel quantity; this deals with the special rules for the carriers. There's a rebate for an annual net fuel adjustment, which is a special rule for rail carriers. As you pointed out, there's a provision for rebate by regulation. There's a general rule for rebate of a charge paid in error.
That's basically it.