(a) Counting days. In computing any relevant period of time, the period shall begin on the day after the act, event, or default in question and shall conclude on the last day of that designated period, unless such last day falls on a Saturday, Sunday, or legal holiday. In that case, the period shall be extended until the end of the next day which is neither a Saturday, Sunday, nor a legal holiday.
(b) Extensions.
  (1) Unless otherwise provided by statute, the time for filing any documents covered by this title may be extended. A written motion must be filed prior to the expiration of the applicable period of time asserting that there is good cause for the extension of time and that the need for the extension is not caused by the neglect, indifference, or lack of diligence of the movant. A copy of any such motion shall be served upon all parties of record concurrently with its filing with the administrative hearings clerk.
  (2) Upon a showing of good cause by petitioner, the hearing examiner may extend the time for submission of a statement of grounds.

Source Note: The provisions of this §17.4 adopted to be effective April 22, 1992, 17 TexReg 2472.