(1) Carriers, subject to this commission may elect either to file their own tariff, or become a participating carrier in an authorized section 5(b) bureau.

(2) Tariffs may be filed with the commission by groups or bureaus, which meet the requirements of such groups or bureaus, as promulgated by the interstate commerce commission.

(3) To obtain authorization to operate in intrastate commerce as a rate bureau, an application shall be made to the commission. This application may be in the same form as an application to the I.C.C. under 49 U.S.C.A. section 5(b) , and the rules adopted thereunder in 49 C.F.R., part 1331. In the alternative, an application which contains the items in 69-12-601 through 69-12-605 , MCA, are acceptable.