I interpreted it that AC YQ would be nill, just based on how I read it. That's the ideal.
I'm totally paranoid though lol, if there's full YQ left on an AC/LH route then yea that kinda ruins it.
My other fear, and I admit to not knowing how this whole thing works...is that AC drops the YQ on their flights, but adds YQ to a bunch of airlines that don't currently have it. I hope someone shoots this down right away by telling me it's not up to AC/AP to impose YQ for them, because I don't know, and I hope I'm way off here.