The state corporation commission may at any time and in its sole discretion, whether or not the facility is still under construction, initiate on its own motion a proceeding to determine in advance whether the costs of such facility were reasonably or prudently incurred, or whether all or a portion of the costs of such facility are or shall be incurred in producing excess capacity under Kan. Stat. Ann. §§ 66-128c and amendments thereto. The proceeding shall be commenced by the commission giving 30 days’ written notice of the setting of the hearing of such proceeding to the public utility or utilities involved, and no other motion shall be required, but the procedure, hearing and right to review shall otherwise be as specified [in] the Kansas administrative procedure act and in Kan. Stat. Ann. § 66-101 et seq., and amendments thereto.