An appeal of right to the Board is permitted. The appeal must be filed within 20 days of a final arbitration decision, unless a later date is authorized by the Board, and is subject to the page limitations of § 1115.2(d). The STB's standard of review of arbitration decisions will be narrow, and relief will be granted only on grounds that the award reflects a clear abuse of arbitral authority or discretion or directly contravenes statutory authority. The timely filing of a petition will not automatically stay the effect of the arbitration decision. A stay may be requested under § 1115.3(f).