Соответствующая норма
Switzerland
Practice Relating to Rule 120. Accommodation for Children Deprived of Their Liberty
Switzerland’s Penal Code (1937), taking into account amendments entered into force up to 2011, which also contains a section on war crimes, states under the title “Sentences and measures”: “If the offender was convicted of an offence committed before he was 18 years of age, the measure may be implemented in an institution for minors.” 
Switzerland, Penal Code, 1937, taking into account amendments entered into force up to 2011, Article 61(5).
Under the title “Execution of sentences and measures, probation assistance, facilities”, the Code further states:
Art. 377
1 The cantons shall establish and operate institutions and institution units for prison inmates in open and secure custody as well as for prison inmates in semi-detention and in day release employment.
2 They may also provide units for special inmate groups, and in particular for:
b. prison inmates of specific age groups. 
Switzerland, Penal Code, 1937, taking into account amendments entered into force up to 2011, Article 377(1) and (2)(b).