The answer is in the definition of "mortgage loans" that is in the beginning of the Mortgage Periodic Statements section. See the last sentence of the section below.
1026.41 Periodic statements for residential mortgage loans.
(a) In general. (1) Scope. This section applies to a closed-end consumer credit transaction secured by a dwelling, unless an exemption in paragraph (e) of this section applies. A closed-end consumer credit transaction secured by a dwelling is referred to as a mortgage loan for purposes of this section.
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Opinion expressed are my own and not necessarily those of my employer.