Any person may be detained by the police for up to 60 days without trial for an act which allegedly threatens the security of the country or any part thereof. After 60 days, one may be further detained for a period of two years each, to be approved by the Minister of Home Affairs, thus permitting indefinite detention without trial. In 1989, the powers of the Minister under the legislation was made immune to judicial review by virtue of amendments to the Act, only allowing the courts to examine and review technical matters pertaining to the ISA arrest.