6. For section 14C(3) (provisions about practical work experience do not apply where certain other provisions operate) substitute—N.I.
“(3) This section and section 14D do not apply—
(a)to anything which is unlawful under any provision of section 4, sections 19 to 21A, sections 21F to 21J or Part 4; or
(b)to anything which would be unlawful under any such provision but for the operation of any provision in or made under this Act.”.