Sec. 1.263  Proposed findings and conclusions.

    (a) Each party to the proceeding may file proposed findings of fact 
and conclusions, briefs, or memoranda of law: Provided, however, That 
the presiding officer may direct any party other than Commission counsel 
to file proposed findings of fact and conclusions, briefs, or memoranda 
of law. Such proposed findings of fact, conclusions, briefs, and 
memoranda of law shall be filed within 20 days after the record is 
closed, unless additional time is allowed.
    (b) All pleadings and other papers filed pursuant to this section 
shall be

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accompanied by proof of service thereof upon all other counsel in the 
proceeding; if a party is not represented by counsel, proof of service 
upon such party shall be made.
    (c) In the absence of a showing of good cause therefor, the failure 
to file proposed findings of fact, conclusions, briefs, or memoranda of 
law, when directed to do so, may be deemed a waiver of the right to 
participate further in the proceeding.

(5 U.S.C. 557)