No volleys while standing in NVZ or with momentum carrying into NVZ; Foot fault if any part of body touches NVZ during volley
Why people argue about this
People often assume that you can only stand in the kitchen for a split second before hitting the ball, which leads to foot faults if they touch it during their volley. Actually, the rule is about staying out of the kitchen entirely while volleying - moving through or even touching it during the shot is what triggers a foot fault, not just standing there briefly.