Mo. Rev. Stat. § 99.700

In any constitutional charter city any person may apply to the land clearance for redevelopment authority of the city for certification that designated real property which he owns, rents, or leases is in a blighted area as defined in section 99.320, and declared to be a blighted area as provided in section 99.430. Upon receiving plans, as they may hereby require, which show that the person applying is engaged in new construction or rehabilitation of the designated real property in accordance with an approved redevelopment or urban renewal plan, the authority shall issue a certificate of qualification for tax abatement to the applicant.