(1) Filing generally. Papers that must be filed with the board are considered to be filed only when the papers are actually received in the board's office in Olympia, Washington.

(2) Filing by telephone facsimile.

(a) Written documents filed with the board by telephone facsimile are considered received when a legible copy of the document is reproduced on the board's telephone facsimile equipment in the board's office. If transmission begins after customary office hours, which are 8:00 a.m. to 5:00 p.m., Monday through Friday, excluding legal holidays, the document will be deemed filed on the next business day.

(b) Any document filed with the board by telephone facsimile should be preceded by a cover page identifying the addressee; the party making the transmission, including the address, telephone and telephone facsimile number of such party; the appeal to which the document relates; the date of transmission; and the total number of pages included in the transmission.

(c) The party attempting to file papers by telephone facsimile bears the risk that the papers will not be timely received or legibly printed, regardless of the cause. If the telephone facsimile is not legible, it will be considered as if it had never been sent.

(d) The original of any document filed by telephone facsimile should be mailed to the board within twenty-four hours of the time that the telephone facsimile was sent.

(e) The filing of papers by electronic mail ("email") is not authorized without the express prior approval of the board, and only under such circumstances as the board allows.