Mo. Rev. Stat. § 513.436
No property upon which a debtor has voluntarily granted a lien shall, to the extent of the balance due on the debt secured thereby, be subject to the provisions of this chapter or be exempt from attachment or execution.
(L. 1987 H.B. 484 § 1)
Effective 7-15-87
(1987) This section is as a conclusion of law unconstitutional for having been passed by the legislature in a manner that failed to conform with Section 23 of Article 3 of the Missouri Constitution that a bill contain only one subject and thus was ineffective to deny avoidance of lien of creditor by debtor. In re Darrell L. Sapp, 81 B.R. 545, Bkrtcy (W.D.Mo.).