These requirements are pretty extensive. The plan shows how much space needs to be around the toilet, free from obstructions like walls, columns, pipes, anything. It also shows how the toilet need to be mounted, how high off the floor and how far away from the side wall. The elevation also show to locate the grab bars on the wall. Now let's look at the lavatory:
"See? Our present toilet rooms are only 5 feet 1 inch wide and 6 feet 6 inches deep, and they're fine!"