The proposed amendment is about "truth in labeling." The current method of distinguishing recreational vehicles (exempt from building codes and HUD standards) from manufactured housing (built to permanent housing standards) was size, and this has become broken by larger park model RVs and large fivers. In addition, park model RVs, particularly, are being sold into the permanent housing market in places where building codes allow this. Many people buying these are led to believe they are getting a mobile home rather than a RV.
The proposal is that RVs built to RV standards be labeled as such, for buyer awareness. It proposes no restrictions on what RVs can be manufactured (indeed, it allows for larger RVs by removing size as the criterion for the HUD standards exemption). It proposes no changes in building codes, which are local, and are the real determinant as to what is considered adequate housing where.