The test center I went gave me a locker. All I took into the test room were
my ID, the locker key, two pencils and scratch paper ( pencil and scratch
paper were provided by the center).
I left a bottle of Coke and some chocolate in the locker. I had some during
the break.
I notified the test center clerk before I opened my locker. They checked
which exam I was taking, and said that CPA test taker can open locker.
Hope this helped.