There shall be 40-inch minimum clearances installed between all opposing base cabinets, counters, appliances, and walls within the kitchen work area. There shall be a 60-inch minimum clearance of floor turning area in U-shaped kitchens or a 40-inch minimum clearance for pass through kitchens. For U-shaped kitchens, there shall be a 30-inch by 48-inch minimum clearance floor area for parallel approach centered on the sink and stove and other appliances or forward approach with knee clearance. Lever fixtures for sinks shall be installed.