What may I have at my desk during the exam?

For CCA exams and CCAH, a candidate may not drink, eat, or have anything on his or her desk. The candidate's desk must be free of all materials. The candidate should not use headphones or leave the desk or the exam session for any reason. He or she must not sit in front of a bright light (be backlight). The candidate's face must be clearly visible to the proctor at all times. The candidate must be alone.