The articles of government for every county, controlled and maintained special school shall provide for it to be the duty of the local education authority, when (following the consideration which they are required to give to the case by virtue of section 24(a) of this Act) they inform a pupil, or a parent of his, of their decision that he should not be reinstated, to inform the pupil or (as the case may be) parent of his right to appeal against the decision.