(a) The commission and other state agencies shall, to the fullest extent possible, exchange records, reports, material, and other information relating to energy resources and conservation and power facilities siting, or any areas of mutual concern, to the end that unnecessary duplication of effort may be avoided.
(b) The commission may take official notice in a proceeding of any document, record, report, material, fact, or other information submitted to, or resulting from, a proceeding of the Public Utilities Commission if all parties to the proceeding in which official notice is being taken are given a reasonable opportunity, upon request, to refute the officially noticed matters, by evidence, or by written or oral presentation of authority, in a manner determined appropriate by the commission.