(6) For purposes of this subsection, the term “adverse action” means a denial or revocation of credit, a change in the terms of an existing credit arrangement, or a refusal to grant credit in substantially the amount or on substantially the terms requested. Such term does not include a refusal to extend additional credit under an existing credit arrangement where the applicant is delinquent or otherwise in default, or where such additional credit would exceed a previously established credit limit.
15 USC § 1691(d)(6)
None identified. Default scope is assumed to be the entire title.