An extension of time within which to file a brief may be granted by the court for good cause shown on written motion filed with the clerk of the court on or before the date the brief is due. If an extension of time is granted to an appellant to file the appellant brief, time for filing the appellee brief shall be extended for a period of twenty days from the date of the extended time granted the appellant, without the necessity of a motion by the appellee. An extension of time may not be granted if such extension will retard the hearing or determination of the case.
La. Uni. R. Ct. Appeal. 2-12.8