(a) An order may be proposed by any organization certified pursuant to the Act or any interested person affected by the Act, including the Secretary. Any person or organization other than the Secretary proposing an order shall file with the Administrator a written application, together with a copy of the proposal, requesting the Secretary to hold a hearing upon the proposal. Upon receipt of such proposal, the Administrator shall cause such investigation to be made and such consideration to be given as, in the Administrator's opinion, are warranted. If the investigation and consideration lead the Administrator to conclude that the proposed order will not tend to effectuate the declared policy of the Act, or that for other proper reasons a hearing should not be held on the proposal, the Administrator shall deny the application, and promptly notify the applicant of such denial, which notice shall be accompanied by a brief statement of the grounds for the denial.

(b) If the investigation and consideration lead the Administrator to conclude that the proposed order will tend to effectuate the declared policy of the Act, or if the Secretary desires to propose an order, the Administrator shall sign and cause to be served a notice of hearing, as provided herein.