37 CFR § 42.5 - Conduct of the proceeding.
(b) The Board may waive or suspend a requirement of parts 1, 41, and 42 and may place conditions on the waiver or suspension.
(1) Setting times. The Board may set times by order. Times set by rule are default and may be modified by order. Any modification of times will take any applicable statutory pendency goal into account.
(2) Extension of time. A request for an extension of time must be supported by a showing of good cause.
(3) Late action. A late action will be excused on a showing of good cause or upon a Board decision that consideration on the merits would be in the interests of justice.
(d) Ex parte communications. Communication regarding a specific proceeding with a Board member defined in 35 U.S.C. 6(a) is not permitted unless both parties have an opportunity to be involved in the communication.