24 C.F.R. § 3286.701
The purpose of this subpart H is to set out the mechanisms by which manufacturers, retailers, distributors, installers, and installation inspectors will be held accountable for assuring the appropriate installation of manufactured homes. The requirements in subpart A of this part are applicable in all states, the requirements in subparts B through H are applicable in states where the HUD-administered installation program operates, and the requirements in subpart I are applicable in states with qualifying installation programs. It is the policy of the Secretary, regarding manufactured home installation program enforcement matters, to cooperate with state or local agencies having authority to regulate the installation of manufactured homes. In addition to actions expressly recognized under this subpart H and other provisions in this part, however, HUD may take any actions authorized by the Act in order to oversee the system established by the regulations in this part.
24 C.F.R. § 3286.701