When the day, or the last day, for taking any action or paying any fee in the United States Plant Variety Protection Office falls on Saturday, Sunday, a holiday within the District of Columbia, or on any other day the Plant Variety Protection Office is closed for the receipt of papers, the action may be taken or the fee paid, on the next succeeding business day.

The Secretary may by regulations prescribe the form of papers to be filed in the Plant Variety Protection Office.

The Secretary may establish regulations for taking affidavits, depositions, and other evidence required in cases before the Plant Variety Protection Office. Any officer authorized by law to take depositions to be used in the courts of the United States, or of the State where the officer resides, may take such affidavits and depositions, and swear the witnesses. If any person acts as a hearing officer by authority of the Secretary, the person shall have like power.

Any document to be filed in the Plant Variety Protection Office and which is required by any law or regulation to be executed in a specified manner may be provisionally accepted by the Secretary despite a defective execution, provided a properly executed document is submitted within such time as may be prescribed.

The Secretary shall prescribe regulations governing the admission to practice and conduct of persons representing applicants or other parties before the Plant Variety Protection Office. The Secretary may, after notice and opportunity for a hearing, suspend or exclude, either generally or in any particular case, from further practice before the Office of Plant Variety Protection any person shown to be incompetent or disreputable or guilty of gross misconduct.

Anyone who in the United States engages in direct or indirect practice before the Office of Plant Variety Protection while suspended or excluded under section 2356 of this title, or without being admitted to practice before the Office, shall be liable in a civil action for the return of all money received, and for compensation for damage done by such person and also may be enjoined from such practice. However, there shall be no liability for damage if such person establishes that the work was done competently and without negligence. This section does not apply to anyone who, without a claim of self-sufficiency, works under the supervision of another who stands admitted and is the responsible party; or to anyone who establishes that the person acted only on behalf of any employer by whom the person was regularly employed.