Originally Posted by Adlerdriver

It's simply a matter of legality. If you put training in a particular spot and that results in you being illegal to sit reserve on one of your scheduled R-days, then the R-day gets dropped. Once those legalities are accounted for, if you've still split your R-days with training then they all go away.

Once "TBD" has been achieved (whenever that is), this may become moot. If you have a 12 hour buffer either side of training, getting it to "touch" your R-days IAW the new contract would be like trying to touch two similar pole magnets. So, I'm not sure how the new CBA will account for buffers and still allow training to conflict with R-days and drop them. I would guess that any conflict resulting in an R-day drop would trigger the whole block to go away.