If the Minister is satisfied, either on complaint by any person or otherwise, that any local education authority or the managers or governors of any county or voluntary school have acted or are proposing to act unreasonably with respect to the exercise of any power conferred or the performance of any duty imposed by or under this Act, he may, notwithstanding any enactment rendering the exercise of the power or the performance of the duty contingent upon the opinion of the authority or of the managers or governors, give such directions as to the exercise of the power or the performance of the duty as appear to him to be expedient.