Missouri Public Service Commission (Commission) Rule 4 CSR 240-4.020(2) provides that any “regulated entity” that intends to file a case likely to be a contested case must file a notice with the Commission a minimum of sixty days prior to filing such case. Until the Commission’s rejection of Grain Belt Express’ application for a certificate of convenience and public necessity (CCN) for its proposed Clean Line project, it was arguably unclear which applicants were “regulated entities” subject to the notice requirement.