Mobilehomes and commercial coaches not affixed to a permanent foundation are subject to what registration?

The correct answer indicates that mobilehomes and commercial coaches that are not affixed to a permanent foundation must be registered with the Department of Housing and Community Development only at the time of sale, resale, or transfer of title. This is essential because such registration ensures that ownership is documented and any changes in ownership are reflected in the state's records. It prevents potential issues related to title discrepancies and supports the legal transfer of the asset.

When a mobilehome or commercial coach is not permanently affixed, it retains certain characteristics of personal property, thus requiring a registration process that aligns with the transactional nature of these fixtures. The specifics of registration during sales or transfers ensure compliance with state regulations and help maintain a proper record of ownership and liability, crucial for both buyers and sellers in the mobile home market.

The other options do not accurately represent how these types of homes are regulated in terms of registration. Annual registration would imply continuous upkeep with the state, which is not required for non-affixed units unless a transaction occurs. Asserting that they are not subject to any registration overlooks the legal framework that necessitates documentation during ownership changes. Thus, the requirement for registration at the time of sale or transfer is vital for maintaining orderly records and ensuring compliance with housing laws in California.