do we need to wear slippers and avoid belts/bras with metal hooks?

(unironically asking for a friend)

"this year, is IOQM going to have metal detectors and/or frisking? so, do we need to wear slippers and avoid bras with metal hooks etc. or clothing with other metal on it? will they frisk us? also, do the ball pens have to be transparent like in jee"

afaik ioqm in the past was not this bad with frisking and all, but iiser etc has been like this