IRC site

CRC Article = 37(b)
The right of the child not to be subjected to unlawful or arbitrary imprisonment and the right to the use of imprisonment only as a measure of last resort and for the shortest appropriate period of time are set forth in Article 37(b) of the CRC.

See also:
Children deprived of their liberty   Deprivation of liberty   Information on absent parent(s) or child   Life imprisonment   Non-custodial measures