(1) Except as otherwise provided in chapters 1 through 9A, 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 chapter is subject to any applicable rule of law that establishes a different rule for consumers, to Title 30, chapter 14, part 1, and to Title 31, chapter 1.
(3) In case of conflict between this chapter and a rule of law, statute, or regulation described in subsection (2), the rule of law, statute, or regulation controls. Failure to comply with a statute or regulation described in subsection (2) has only the effect that the statute or regulation specifies.
(4) This chapter does not:
(a) validate any rate, charge, agreement, or practice that violates a rule of law, statute, or regulation described in subsection (2); or
(b) extend the application of the rule of law, statute, or regulation to a transaction not otherwise subject to it.