For section 206(1) of that Act, there shall be substituted the following section—

“206 Detention of children convicted on indictment.

Subject to section 205 of this Act, where a child is convicted and the court is of the opinion that no other method of dealing with him is appropriate, it may sentence him to be detained for a period which it shall specify in the sentence; and the child shall during that period be liable to be detained in such place and on such conditions as the Secretary of State may direct.”