Each transmission service customer that submits an annual report of loads and resources to the Electric Reliability Council of Texas independent system operator pursuant to §RSA 25.198<subdiv>(l)</subdiv> of this title (relating to Initiating Transmission Service) or other reliability council shall file a copy with the commission and maintain a copy of supporting documentation for five years. If no such annual report is prepared, the transmission service customer shall maintain a record of the load and resource documents prepared in the normal course of its activities for five years.
16 Tex. Admin. Code § 25.89