The truth is, No One, except the person that built the structure could tell you how it was actually built. Whether it was in compliance, is very difficult to verify, as most of the features are hidden. Even if the construction documents show it designed in compliance with a code, doesn’t mean it was built according to the plans.
very few building officials would take the time to examine the blueprints, most just look at the construction in front of them, and as long as it meets the local code, they will be signing off on the permit.
As far as the 1802 is concerned, no one will be prosecuted, (unless they commit outright fraud), because there is no defining document. The crap the OIR put out is open to interpretation, and as can be seen on this message board, there are a ton of ways to interpret the form.
So despite all the “Chicken Littles”, no one could be successfully prosecuted, because they choose to use a particular interpretation, however far out that interpretation may be.
The form is way too vague to be able to be used as a basis for prosecution, without a defining manual accompanying it, and the OIR have never put out such a document.