After the cassation court of general jurisdiction has ruled, a further cassation complaint may be made to the Judicial Collegium for Criminal Cases of the Supreme Court under Article 401.3 of the Criminal Procedure Code. A single judge of the Supreme Court examines the complaint and decides whether to refer it to a hearing. If referred, the Collegium hears it and may quash or amend the decisions below.
Beyond that lies supervisory review by the Presidium of the Supreme Court under Chapter 48.1. This is genuinely exceptional and is reserved for decisions of the Supreme Court's own collegia.