045-1 Wyo. Code R. § 1-16
(a) Contract motor carriers shall use and carry in their motor vehicles at all times uniform bills of lading showing all property being transported. The carrier shall deliver copies to both consignor and consignee and retain a copy for Department inspection.
(b) A combination bill of lading and freight bill, setting forth complete information and transportation charges, may also be used. The combined form of bill of lading and freight bill shall be issued in at least triplicate and shall consist of an original, a shipping order copy, and a memorandum copy. The number of memorandum copies as desired may be issued, but each copy shall carry a notation showing whether it is the original, the shipping order, or a memorandum copy. The carrier shall retain a copy of the shipping order for three years for possible inspection by WYDOT at its convenience.
(c) Instead of executing the combination bill of lading mentioned in preceding paragraph (b), the carrier may execute a separate bill of lading and a separate freight bill as long as all the required information is shown on them.
(d) When more than one vehicle is used to transport a shipment, the bill of lading or memorandum showing information required on the bill of lading shall be carried on each vehicle during shipment transport. Such memorandum shall refer to the bill of lading covering the entire shipment. (See W.S. 31-18-209.)
(e) Private motor carriers are not required to carry in their motor vehicles a bill of lading or other shipping document, except when transporting a hazardous material as required in 49 C.F.R. 177.817 as adopted by the Department. The requirement for intrastate private carriers shall be governed by the appendix to these rules and regulations.
045-1 Wyo. Code R. § 1-16