(a) As soon as practicable after the time for the parties to file proposed findings of fact and conclusions of law has expired, the presiding officer shall prepare a report containing the following:

(1) His recommended rulings on the proposed findings of fact and conclusions of law;

(2) His recommended findings of fact and conclusions of law, with the reasons therefore; and

(3) His recommended decision.

(b) The presiding officer shall serve a copy of his report upon each party in the hearing. The report shall be considered to have been served when it is mailed to such party or its attorney of record.

(c) Not less than twenty-five days after the date on which he caused copies of his report to be served upon the parties, the presiding officer shall certify to the Administrator the record, which shall contain the transcript of testimony, exhibits, the findings of fact and conclusions of law proposed by the parties, the presiding officer's report, and any exceptions thereto which may have been filed by the parties.