The umpires are WI and South African. The location has nothing to do with it.
He hasn’t been accused of chucking, it might be one ball he bowls and might have been once or twice. If the umpire thinks he sees something they have to check it with footage after play and then if it confirms their eye test, they have to make the report.
The panel and the science at the time said that if you kept it at the current law you would have to no-ball everyone- Even McGrath was above the threshold- it...