Yes the 'veto' as you call it would be enforceable in the first week essentially. You can't have the home nation taking someone the training nation has already selected after that, it wouldn't be fair
Look at it this way: if a player is truly exceptional the home nation will get him, if he's second or third tier the home nation will still have the chance of selecting him, however they will need to do it in the first week or just before the training nation does after that (if neither have called him up).
The starters get called up right away. The backups and situational players get called during the season because the Coach likes the flexibility to pick from a larger pool.
I think the requirements may be as stringent as you like. 3 seasons uninterrupted for U21 (i.e. fully trained by the training team) and, I don't know 6 seasons for NT? I can't imagine many players will satisfy these criteria except the ones trained for most of their career by the same team.
My Chinese C might have been a solid backup NT player for a medium nation, but he was never selected for China (understandably)
Last edited by Lemonshine at 5/11/2018 3:08:03 PM