37 C.F.R. § 42.25

(a) A motion may only be filed according to a schedule set by the Board. The default times for acting are:

(1) An opposition is due one month after service of the motion; and

(2) A reply is due one month after service of the opposition.

(b) A party should seek relief promptly after the need for relief is identified. Delay in seeking relief may justify a denial of relief sought.