Provided that no child while in such custody shall be married except with the permission of the competent authority.

Delinquent child undergoing sentence at the commencement of the Act 57. In any area in which this Act is brought into force, the Government may direct that a delinquent child who is undergoing any sentence of imprisonment on the commencement of this Act shall, in lieu of undergoing such sentence, be sent to a special school or be kept in safe custody in such place and manner as the Government thinks fit, for the remainder of the period of the sentence, and the provisions of this Act shall apply to the child as if he had been ordered by a children's court to be sent to such special school or, as the case may be, ordered to be detained under sub-section (1) of section 24.