Wyo. Stat. § 37-2-116: Ordering production of records.

The commission, by order, may require any public utility or any officer or agent thereof to produce within the state at such time and place as it may designate, any accounts, records, memoranda, books or papers kept in any office or place without or within the state, or in its discretion may in lieu of originals order the production of verified copies thereof in order that an examination thereof insofar as they relate to intrastate business, may be made by the commission or by any person under its direction.