Actually the new HUD rules have been floating around for a year or two for comment by the RV and Manufactured housing industry.
They were requested by the industry to define a Recreational Vehicle vs a Manufactured home and to clarify the standards to which the categories must comply and reporting and paperwork requirements. Whether or not you can full time in an RV is still a local issue which local jurisdictions stating how long you can stay in campgrounds etc...
Here is the link to the RVDA article which does a better job of explaining the new rules. Escapees also sent out an email to their members a couple of months ago explaining the rules.
Why HUD's Proposed Rule Redefining RVs is Critical to RV Industry and RV Enthusiasts
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