Section 51. Any person in whose custody a child is placed in pursuance of this Act shall, while the order is in

51. Any person in whose custody a child is placed in pursuance of this Act shall, while the order is in force, have the like control over the child as he would have if he were his parent, and shall be responsible for his maintenance, and the child shall continue in his custody for the period stated by the competent authority, notwithstanding that he is claimed by his parent or any other person: Delinquent child undergoing sentence at commencement of the Act. Provided that no child while in such custody shall be married except with the permission of the competent authority.