This guy is yanking your chain, we're required to be dressed in black tie attire at all times. Hope you have a few tuxes or ball gowns lying around, my dry cleaning bill is off the charts.Lectures are pretty laid back. No mandatory attendance and no apparent adherence to a strict dress code if there is one.
Be mindful of your dress in lab, so as to make things easier for your partners. That means try to wear scrubs or shorts and a t-shirt for OMM and DPR.
For ICC wear business professional with white coat - that means shirts and ties for guys, slacks, and dress shoes, and nice blouses and slacks or skirts for women (or whatever that equivalent is, forgive my ignorance).
It is nice to dress up when admin is holding a meeting or there is a guest. I dress well when our various Deans hold meetings or when we have professional development. They’ll usually let you know if there is a time they really want you to go all out.
So the school is pretty laid back, just use common sense judgement and you will be fine.