A request for an order, except when an application is authorized by these rules, shall be by written motion, unless made during a hearing. The motion shall state with particularity the grounds therefor, and shall set forth the relief or order sought. Every written motion, other than one which may be considered ex parte, shall be served by the moving party within the time determined under Rule 9006(d). The moving party shall serve the motion on:
(a) the trustee or debtor in possession and on those entities specified by these rules; or
(b) the entities the court directs if these rules do not require service or specify the entities to be served.