I think with the question around the 17 years, the 14 years and some of the representations you're hearing from businesses today, the time for consultation has to end, and at a certain point you need to freeze the design and then move into testing and implementation. If you hold the design open too long, you get into increased costs and delaying the benefits.
There are two costs. You can look at how much it cost to build CARM, but I mentioned a possible revenue lift in the range of $400 million, or $160 million a year. The estimates vary. There are tens of millions of dollars of benefits and there's also a burden reduction for Canadian business.
I think a key lesson learned from the U.S. and Australian experiences is that at some point you have to stop the consultation on design.