(a) The provisions of this article shall govern the construction and punishment for any offense defined in this code and committed after March 19, 1979, as well as the construction and application of any defense to a prosecution for such an offense.

    (b) Offenses defined outside of this article and not repealed shall remain in effect, but unless otherwise expressly provided, the provisions of this article shall not govern the construction of any such offenses, nor shall the construction and application of any defense to a prosecution for such offenses be affected.

    (c) The provisions of this article do not apply to or govern the construction of and punishment for any offense committed prior to March 19, 1979, or the construction and application of any defense to a prosecution for such an offense. Such an offense must be construed and punished according to the provisions of law existing at the time of the commission thereof in the same manner as if this article had not been enacted.

(Code 1964, § 7.420)

     State law reference(s)--Similar provisions, RSMo. § 556.031.