On or after July 1, 2019, and prior to July 1, 2029, sales or leases of rolling stock, regardless of whether the purchaser is a public services corporation engaged in business as a common carrier of property or passengers by railway, for use or consumption by a common carrier directly in the rendition of public service are exempt from sales tax. For purposes of this Section, "rolling stock" means locomotives, autocars and railroad cars and "sales or leases" includes railroad car maintenance and retrofitting of railroad cars for their further use only on the railways.
Okla. Admin. Code § 710:65-13-158