—Where a report has been made under subsection (3) of section fifty-seven of the principal Act of a decision that a child is incapable on the ground of mental disability of receiving education at school, if at any time thereafter the local health authority, or an authority or body responsible for the management of an institution in which the child is under care, are of opinion that the decision ought to be reviewed, they shall notify the local education authority of their opinion, and thereupon the provisions of subsections (1) and (2) of that section as to the medical examination of the child shall apply as on its first appearing to the local education authority that the- child was suffering from the disability, and if they decide, after considering the advice given by the medical officer and any reports or information from the authority or body who notified the opinion that the decision ought to be reviewed or other persons, that the child is capable of receiving education at school, they shall cancel their original report.