3rd Title: Confederation, Cantons and Communes
Chapter 2: Powers
Section 10: Civil Law, Criminal Law, Weights and Measures
Art. 123a
1 If a sex offender or violent offender is regarded in the reports required for sentencing as being extremely dangerous and his or her condition assessed as untreatable, he or she must be incarcerated until the end of his or her life due to the high risk of reoffending. Early release and release on temporary licence are not permitted.
2 Only if new scientific findings prove that the offender can be cured and thus no longer represents a danger to the public can new reports be drawn up. If the offender is released on the basis of these new reports, the authorities granting his or her release must accept liability if he reoffends.
3 All reports assessing sex offenders or violent offenders must be drawn up by at least two experienced specialists who are independent of each other. The reports must take account of all the principles that are important for the assessment.
National penalties - life imprisonment
EDIT.