Under Article 22 of the Constitution, what is the maximum period a person can be detained under a preventive detention law without obtaining the opinion of an Advisory Board?

Explanation

Article 22(4) states that no law providing for preventive detention shall authorize the detention of a person for a longer period than three months unless an Advisory Board consisting of persons who are judges of a High Court has reported before the expiration of the said period that there is sufficient cause for such detention. Note: Though the 44th Amendment reduced this to 2 months, that provision has not been officially brought into force yet.