Mo. Rev. Stat. § 407.857: Reimbursement for warranty work performed by certain retail sellers of power equipment.

Retailers who sell and service industrial, maintenance and construction power equipment or outdoor power equipment as defined in section 407.850, and who do warranty repair work for a consumer under provisions of a manufacturer's express warranty, shall be reimbursed by the manufacturer for the warranty work at an hourly rate that is the same or greater than the hourly labor rate the retailer currently charges consumers for nonwarranty repair work.