There is no OC law other than RSMo 21.750.3, which permits political subdivisions to ban OC. OC is the default manner of carry in Missouri, Article I Section 23 of the State Constitution explicitly segregates CCW and as such OC can not be regulated.....even though RSMo 21.750.3 does regulate it.
I am not aware of any court case that has challenged this dichotomy.
I suggest that you research the local municipalities that will be in your general area, or more aptly, in your future general area.
Read RSMo 571 in its entirety. That is our CCW law. RSMo 571.107 is where a endorsement does not permit CCW by statute.
Welcome to the Show Me State.