(a) A manufacturer or distributor shall fairly and adequately compensate its dealers for warranty work.
(b) A manufacturer or distributor may not pay or reimburse a dealer an amount of money for warranty work that is less than the amount the dealer charges a retail customer for similar nonwarranty work.

(c) In computing the amount of money a dealer charges a retail customer under Subsection (b), the manufacturer or distributor shall use the greater of:
(1) the average labor rate charged during the preceding six months by the dealer on 100 sequential nonwarranty repair orders, exclusive of routine maintenance; or
(2) the average labor rate charged for 90 consecutive days during the preceding six months by the dealer for nonwarranty repairs, exclusive of routine maintenance.