Mo. Rev. Stat. § 302.782
Because immediate action is necessary in order to change state laws relating to commercial motor vehicle operators' licenses in time to conform to federal guidelines, section A of this act is deemed necessary for the immediate preservation of the public health, welfare, peace and safety, and is hereby declared to be an emergency act within the meaning of the constitution, and section A of this act** shall be in full force and effect upon its passage and approval, except that sections 302.745, 302.750, 302.755 and subsection 1 of section 302.780 of this act shall not become effective until April 1, 1992, unless the secretary extends beyond April 1, 1992, the date for which all commercial motor vehicle operators must meet the provisions of the Commercial Motor Vehicle Safety Act of 1986 (Title XII of Pub. Law 99-570), in which case sections 302.745, 302.750, 302.755 and subsection 1 of section 302.780 of this act shall become effective on the new date set by the secretary.
(L. 1989 1st Ex. Sess. H.B. 3 § B)
*Transferred 1990; formerly 307.782
** "This act" (H.B. 3, lst Ex. Sess. 1989) contains numerous sections. Consult Disposition of Sections table for definitive listing.