Mo. Rev. Stat. § 144.809

In addition to the exemptions granted pursuant to the provisions of section 144.030, there is hereby specifically exempted from the provisions of, and the computation of the tax levied, assessed or payable under, any state or local sales or use tax, or any increase in any state or local sales or use tax rate, which tax or increase was not in effect on December 30, 1987, the sale, storage, use or consumption of aviation jet fuel at or upon airports within the state of Missouri, which airports are recipients of federal grant funds, have submitted applications for or have been approved for federal grant funds, or which are otherwise eligible to apply for federal grant funds.