Those were the rules under the temporary solvency relief measures. Those are not, to my knowledge, permanent rules that are being proposed here.
You are right that in order to secure member buy-in for the ten-year amortization, a number of companies simply...especially those companies, such as CN or CP or Bell Canada, that have tens and tens of thousands of employees. It's simply not practical to go down that route. They chose rather to secure the benefit through a letter of credit, which was the other alternative that was available.