So here is what happened in my case, over two years ago now. Basically everyone who was married/common-law and joined/transferred into the regular force prior 1 Sep 12 was "grandfathered". Everyone who came on board after that date paid rations, married or not.
So on my course we had several guys, myself included, who having joined prior to the deadline, were actually posted to other bases. In my case I was posted to Meaford (from Borden) sometime in April of 2013, backdated to 1 Jan 13, although I never stepped foot in the place while I was posted there. I was then attach-posted from Meaford back to Borden, where I actually was. So I did not have to pay rations, because I was technically on TD, though no incidental TD allowance was authorized. I wasn't too worried about the $17/$11 bucks a day, so long as I wasn't paying the $600 per month for rations.
Another married guy on course, who transferred from the Mo after the deadline, had to pay rations, which was shitty for him, obviously.
Note that this only really applies to those coming off the BTL and posted to training bases for QL3 training. If posted to another (non-training) base and attending training you would be entitled to rations as part of being on TD. In my trade, people are no longer posted to Borden before QL3. They are now sending people directly from St Jean to units, so those attending QL3 will be on TD the whole time, lucky buggers.
As for de-linking, forget it, especially in Borden. Since the shacks in Borden do not have any kitchen facilities (besides a mini-fridge, if allowed), there is no food prep ability, therefore no way to feed oneself in a healthy manner. As well, the academic thing, because some idiot in the distant past obviously claimed that he/she failed a course because of inadequate nutrition because they were not on ration strength. Thanks a lot, whoever you were, way to frig it up for everyone else. Funny enough, there were people who while awaiting training in Borden tried to de-link based on the fact that they were not actually on course yet, but were still refused.