My understanding is that the dual-intent visa categories have change-of-status rules written into law.
The adjustment of status process is written into law for all non-immigrant visa categories (except for a couple weird ones, like the visas for crew of ships and aircraft).
alt Hacker News
The adjustment of status process is written into law for all non-immigrant visa categories (except for a couple weird ones, like the visas for crew of ships and aircraft).