1. Peremptory norms and their legal consequences as a feature of general international law; 2. Legal consequences for treaties; 3. Peremptory norms outside the Vienna convention: treaties of questionable validity by reason of their content; 4. Legal consequences for security council resolutions; 5. Legal consequences for certain unilateral acts; 6. Legal consequences in the law of international responsibility; 7. Legal consequences for state immunity; General conclusions.