If it is the borrower's primary residence and it is not a RMT then yes ROR applies.
From 226.2
(19) Dwelling means a residential structure that contains 1 to 4 units, whether or not that structure is attached to real property. The term includes an individual condominium unit, cooperative unit, mobile home, and trailer, if it is used as a residence.
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The opinions expressed are mine and they are not to be taken as legal advice.