(b) Written motion. A party shall file a written motion for an extension of time with the administrative law judge not later than 7 days before the document is due unless good cause for the late filing is shown. A party filing a written motion for an extension of time shall serve a copy of the motion on each party. The administrative law judge may grant the extension of time if good cause for the extension is shown.
(c) Failure to rule. If the administrative law judge fails to rule on a written motion for an extension of time by the date the document was due, the motion for an extension of time is deemed granted for no more than 20 days after the original date the document was to be filed.