(a) Except as otherwise provided in Subtitle I of Title 28, a security agreement is effective according to its terms between the parties, against purchasers of the collateral, and against creditors.
(b) A transaction subject to this article is subject to any applicable rule of law which establishes a different rule for consumers and §§ 28-3301 to 28-3314.
(c) In case of conflict between this article and a rule of law, statute, or regulation described in subsection (b), the rule of law, statute, or regulation controls. Failure to comply with a statute or regulation described in subsection (b) has only the effect the statute or regulation specifies.
(d) This article does not:
(1) Validate any rate, charge, agreement, or practice that violates a rule of law, statute, or regulation described in subsection (b); or
(2) Extend the application of the rule of law, statute, or regulation to a transaction not otherwise subject to it.