Mo. Rev. Stat. § 135.335
In the year of adoption and in any year thereafter in which the credit is carried forward pursuant to section 135.333, the credit shall be reduced by an amount equal to the state's cost of providing care, treatment, maintenance and services when:
(L. 1987 S.B. 402 § 7, A.L. 2014 H.B. 1299 Revision, A.L. 2021 H.B. 429 merged with H.B. 430)