Piercings

So, tonight I have just found out that one of my players has just had their ear pieced, 2.5 weeks before the start of our season. I didn’t need to look up the rules for things like this but I did anyway, and the rules state that you cannot play in matches, unless it is removed,  but can he be allowed to take part in training? I don’t think he can as training involves contact too, so surely not?