I didn't bring my railway atlas with me; I should have. There are some rail lines in northern Quebec where, in order to come off that line and really go anywhere, the traffic has to move through a corridor that's excluded under the long-haul interswitching provisions. CN lines that connect with the main CN system, or with other carriers in the Montreal or Quebec area, are the only ones where a connection exists. Some parts of Quebec could connect through Rouyn-Noranda or Val-d'Or, but there are significant lines in northern Quebec that don't have that option. Really, the only place they connect with a second carrier would be in the corridor and so long-haul interswitching as drafted is out.
On September 12th, 2017. See this statement in context.