Silly people. Amortization is part of 'operating expenses'. That pretty much means that the depreciation on the bridge all comes off before Canada calculates what it pays to the States. It pretty much covers the interest on the debt, and a good chunk of the debt itself. So the debt payments are disguised as 'amortization'. Usually, depreciation is added back through an entry in cash flow. which goes to the Canadian government.
Whoever says that 'bridge debt' is not included in the side agreement just does not understand accounting. Of course, Trump does not understand it, either.