A lot of places building codes "require them" at a high level, and then more local building codes strike provisions like this, or provide "alternate paths" to legality. It's disgusting.

Like around here, the building code in one city requires a certain blower door score to pass. But doesn't require blower door testing if you say you followed certain "sufficient" practices. There's no way most of these houses would achieve a sufficient blower door test score, but they all "comply with code".