(1) Inspection. Every public service company must make its accounts, books, papers, and documents available for commission inspection at any and all times.

(2) Production. The commission may require a public service company to provide copies of documents to the commission for inspection at the commission's offices.

(a) Format. The commission will require a public service company to provide documents for commission inspection by serving the company with a letter or other writing signed by the secretary or an administrative law judge.

(b) Response. The public service company must provide the required documents, or any objections to providing those documents, to the commission within ten business days of the date the commission serves the letter or other writing unless the commission specifies a different deadline.

(c) Objections. Any objections the public service company gives in lieu of providing the requested documents must describe in detail the legal and factual basis for the company declining to provide the documents. Commission staff must file a response to the objections within five business days. The commission will notify the company of the disposition of its objections and the date by which the company must provide any requested documents the commission determines that the company must provide.