Revenue Recognition Revenues are recognized for the transportation of crude oil and refined petroleum products upon delivery of actual volumes transported at contractual tariff rates. Revenues are recognized for terminaling crude oil and refined petroleum products as terminaling services are performed based on contractual rates. As further described in Note 4 , our commercial agreements (defined in Note 4 ) with Valero contain minimum volume commitment requirements. Under these agreements, if Valero fails to transport its minimum throughput volumes during any quarter, then Valero will pay us a deficiency payment equal to the volume of the deficiency multiplied by the tariff rate then in effect. Valero may apply the amount of any such deficiency payments as a credit for volumes transported on the applicable pipeline and terminal systems in excess of its minimum volume commitment during the following four quarters under the terms of the applicable commercial agreement. The deficiency payments are initially recorded as deferred revenue from related party. We recognize revenues for the deficiency payments at the earlier of when credits are used for volumes transported in excess of minimum volume commitments or upon the expiration of the applicable four-quarter period. The use or expiration of the credits is a reduction to deferred revenue from related party. Certain of our commercial agreements with Valero are considered operating leases under U.S. GAAP. Lease revenue is recognized over the lease term and contingent lease revenue is recognized after minimum monthly volume commitment requirements on these leases have been met. Prior to the Offering, our Predecessor recognized revenues under various operating leases with Valero for crude oil and refined petroleum products storage capacity.