(a) Each retail electric provider that offers electricity for sale shall report to the commission:
(1) its annual retail sales in this state;
(2) the annual retail sales of its affiliates by number of customers, kilowatts per hour sold, and revenue from kilowatts per hour sold by customer class; and
(3) any other information the commission requires relating to affiliations between retail electric providers.
(b) The commission by rule shall prescribe the nature and detail of the reporting requirements. The commission may accept information reported under other law to satisfy the requirements of this section. Information reported under this section is confidential and not subject to disclosure if the information is competitively sensitive information. The commission shall administer the reporting requirements in a manner that ensures the confidentiality of competitively sensitive information.