Wyo. Stat. § 37-4-103: Filing security interests.

(a) If filing is required under the Uniform Commercial Code, the proper place to file in order to perfect a security interest in personal property or fixtures of a transmitting utility is in the office of the secretary of state.

(b) When the financing statement covers goods of a transmitting utility which are or are to become fixtures, no description of the real estate concerned is required.

(c) A security interest in rolling stock of a transmitting utility may be perfected either as provided in section 20(c) of the Interstate Commerce Act or by filing a financing statement pursuant to the Uniform Commercial Code as provided in subsection (a).