34 CFR §86.405

1. (a)Any written submission under this subpart must be filed by hand-delivery, by mail, or by facsimile transmission. The Secretary discourages the use of facsimile transmission for documents longer than five pages.
2. (b)If a party files a brief or other document, the party shall serve a copy of the filed material on the other party on the filing date by hand-delivery or by mail. If agreed upon by the parties, service of a document may be made upon the other party by facsimile transmission.
3. (c)Any written submission must be accompanied by a statement certifying the date that the filed material was filed and served on the other party.
4. (d)
   1. (1)The filing date for a written submission is the date the document is—
      1. (i)Hand-delivered;
      2. (ii)Mailed; or
      3. (iii)Sent by facsimile transmission.
   2. (2)If a scheduled filing date falls on a Saturday, Sunday, or Federal holiday, the filing deadline is the next Federal business day.
5. (e)A party filing by facsimile transmission is responsible for confirming that a complete and legible copy of the document was received by the Department.
6. (f)If a document is filed by facsimile transmission, the Secretary or the designated Department official, as applicable, may require the filing of a follow-up hard copy by hand-delivery or by mail within a reasonable period of time.