Whenever an electrical utility, electric cooperative, consolidated political subdivision, public utility district, governmental body or agency, or another person or corporation, is engaged or is about to engage in construction or operation without having secured a certificate of public convenience and necessity as required by the provisions of this chapter, or otherwise in violation thereof, any interested electrical utility, electric cooperative, consolidated political subdivision, corporation or municipality may file a complaint with the Commission. The Commission may, with or without notice, make its order requiring the party complained of to cease and desist from such construction or operation until the Commission may, after hearing, make such order and prescribe such terms and conditions in harmony with this chapter as are just and reasonable.