(1)    The secretary shall make and publish findings upon every material point controverted at the hearing and required by this chapter, and upon such other matters which may be relevant to the issuance, amendment or termination of a marketing order or agreement. The secretary shall issue a decision within 45 days after the close of the hearing based upon the findings and shall cause copies of the findings and recommended decision to be delivered or mailed to all parties of record appearing at the hearing or their attorneys of record. The decision shall contain the text in full of any order or agreement or amendment or termination of an existing order or agreement, and may deny or approve the proposal in its entirety or it may recommend a marketing order or agreement containing different terms or conditions from those contained in the proposal, but such decision shall be substantially within the purview of the notice of hearing and shall be supported by evidence taken at the hearing or by documents of which the secretary is authorized to take official notice. The secretary shall not approve the issuance, amendment or termination of any marketing order or agreement unless the secretary finds all of the following:

      (a)    That the proposed issuance, amendment or termination is reasonably calculated to attain the objectives sought in the proposed marketing order or agreement.

      (b)    That the proposed issuance, amendment or termination is in conformity with this chapter.

      (c)    That the interests of consumers of such commodity are protected in that the powers of this chapter are being exercised only to the extent necessary to attain such objectives.

   (2)   The secretary shall deliver or mail copies of the decision to the same parties to whom copies of the findings are required to be sent. If the final decision denies the proposal in its entirety, no further action shall be taken by the secretary.