Boy, I really started something here!
All this red ink is making me dizzy!!
I used to work in a restaurant washing dishes with a bunch of friends of mine who were very young and irresponsible. In a commercial setting like that you can't have too many regulations. Besides, the dishwasher is used hundreds of times a day.
In a house, condo, apartment, etc., the dishwasher is used about once a day. Furthermore, when there is a sink backup, there are usually a few dishes, glasses, silverware, or pots and pans in the sink when that happens. These items then become contaminated. There is no rule or regulation about what someone must do in this case. Yet, we tend to muddle through without one. We don't lick the crud off with our tongue, become infected, and die. We wait 'til the backup is fixed and we throw them in the dishwasher. Or we go to another sink to clean them.
It's been my experience that government rules and regulations, and the enforcement of such, increases with each passing day. So, the fact that high looping of dishwasher drains is allowed in Michigan and Florida, and New Mexico (where I currently live) tells you that it is not a problem.
What is a problem, is when the little hole in the garbage disposer where the dishwasher drain comes in gets plugged up with gunk, and the dishwasher drains completely through the air gap onto the counter and onto the floor and onto the ceiling below. Now that's a problem that used to come up all the time, but doesn't anymore. Talk about a mess!!