be made, and other information. The Minister can then direct that people whose appointment would be prejudicial to the interests of Singapore shall not be appointed or recruited. Furthermore, no person is permitted to disclose any communication received from the Minister except in the course of official duty. The Minister, if satisfied that a school or educational institution is being used for a purpose detrimental to the interests of Singapore or the public, for instruction that is detrimental to the interests of the public or pupils, or as a meeting-place of an unlawful society, can order that it be closed for a period not exceeding six months at a time. The board of managers or governors of an affected school or educational institution can lodge an objection against an order with the President, whose decision on the matter is final and may not be questioned in any court. The Minister's power does not extend to places where the teaching "is of a purely religious character, or for a purely religious purpose". A person who requires a certificate of suitability for admission to an institution of higher education must apply to the Director of Education, who must not issue a certificate if "there appear to him to be reasonable grounds for believing that the applicant, if admitted to the institution in question, would be likely to promote, or otherwise participate in, action prejudicial to the interests or security of Singapore or any part thereof". A person who does not hold a certificate of suitability may not be admitted to an institution of higher learning as a student. A person who has been refused a certificate may appeal to the Home Affairs Minister, whose decision on the matter is final and cannot be called into question in any court. The Minister can forbid pupils, students, teachers or members; any class of pupils, students, teachers or members; or any named pupil, student, teacher or member of any school, college, educational institution or students' union or association situated or established outside Singapore to enter into or travel within Singapore as a group unless they first obtain permission from the police to do so. An individual pupil, student, teacher or member can also be barred from Singapore if they intend to carry out within the country some common object of the group to which they belong. The police can grant permission for such travel subject