Hamilton's conflict with new F1 race director Niels Wittich was a snack during the Australian Grand Prix this weekend.
The Briton has competed with both nose piercings and earrings for several seasons, despite body piercing being banned in Formula 1 since 2004.
Wittich addressed the rules when he commented on this weekend's competition program in Melbourne - and he also discussed the rule directly with Hamilton and his competitors ahead of this weekend's race.
Wittich emphasized that the piercing ban is there to protect drivers by not letting anything stop them if they have to leave the car quickly in an emergency.
"It's personal things"
But Hamilton still ran Sunday's race with both piercings and earrings.
- I have no plans to remove them.
These are personal things.
And you should be who you are.
There are things I can not remove.
These, in the right ear, I have welded in, so then I have to cut off the ear in that case, said the 37-year-old after the Melbourne Grand Prix where he finished fourth.
According to the International Motorsport Federation, FIA, regulations, it is forbidden to use body piercings or necklaces during competition.
Anyone who breaks the rules can be punished with either a fine or a point deduction.
According to the German news agency DPA, the FIA plans to see if the Mercedes driver's attitude changes in the coming weekends before the union takes any action.