37 C.F.R. § 41.123
(a) A motion, other than a miscellaneous motion, may only be filed according to a schedule the Board sets. The default times for acting are:
(b) Miscellaneous motions.
(1) If no time for filing a specific miscellaneous motion is provided in this part or in a Board order:
(2) An opposition may not be filed without authorization. The default times for acting are: