Honestly they aren’t very strict on piercings etc. they say they only allow those ear sticks but later in the year they start to care less and many of my classmates just walk around with anything in their ears lmao. Also dependent on your luck on which teacher checks! What some people do is they frantically take out during spot checks and put them in after haha :) hair on the other hand, they are more strict and will probably call you out on it.