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