((a)) ** Notice and hearing** Whenever the Secretary has reason to believe that the issuance of an order will tend to effectuate the declared policy of this chapter, the Secretary shall give due notice and opportunity for hearing upon a proposed order. Such hearing may be requested and proposal for an order submitted by an organization certified pursuant to , or by any interested person affected by the provisions of this chapter, including the Secretary.section 3413 of this title

((b)) ** Effectuation of Congressional policy** After notice and opportunity for hearing as provided in subsection (a) of this section, the Secretary shall issue an order if the Secretary finds, and sets forth in such order, upon the evidence introduced at such hearing that the issuance of such order and all the terms and conditions thereof will tend to effectuate the declared policy of this chapter.