What does the amended clause (4) state about preventive detention laws?
The amended clause (4) states that no law providing for preventive detention shall authorize the detention of a person for a longer period than two months unless an Advisory Board constituted in accordance with the recommendations of the Chief Justice of the appropriate High Court has reported before the expiration of the said period of two months that there is in its opinion sufficient cause for such detention. The Advisory Board shall consist of a Chairman (a serving Judge of the appropriate High Court) and not less than two other members (serving or retired Judges of any High Court). Furthermore, this clause does not authorize the detention of any person beyond the maximum period prescribed by any law made by Parliament under sub-clause (a) of clause (7).