(a)Timing. Appellant may file only a single reply brief to an examiner's answer within the later of two months from the date of either the examiner's answer, or a decision refusing to grant a petition under § 1.181 of this title to designate a new ground of rejection in an examiner's answer. (b)Content. (1) A reply brief shall not include any new or non-admitted amendment, or any new or non-admitted affidavit or other Evidence. See § 1.116 of this title for amendments, affidavits or other evidence