Mo. Rev. Stat. § 162.1049
Nonresident district and resident district to accept each other's credits.
162.1049. Nonresident district and resident district to accept each other's credits. — A nonresident district shall accept all credits toward promotion or graduation awarded by a district of residence. If a student returns to the student's district of residence prior to graduation, the district of residence shall accept all credits issued by an enrollment option district.
(L. 1994 H.B. 1218 § 2 subsec. 2)