Under the old rules the ETIL was only required for a Residential Mortgage Transaction, which is defined at 226.2(a)(24), subject to RESPA. Refinancings and most subordinate lien loans did not meet that definition therefore they were exempt from the ETIL.
With the MDIA changes the wording in 226.19(a) was changed and the word "Residential" was removed. Now any mortgage transaction subject to RESPA requires an ETIL.
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The opinions expressed are mine and they are not to be taken as legal advice.