(2) It shall come into force on such date as the Central Government may, by notification in the Official Gazette, appoint and different dates may be appointed for different provisions of this Act.

3.Amendment of article 22. In article 22 of the Coiistitutitution,-

(a) for clause (4), the following clause shall be substituted,namely :-

'(4)No law providing for preventive detention shall authorise 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:

Provided that an Advisory Board shtil consist of at Chairman and not less than two other members and the Chairman shall be a serving Judge of the appropriate High Court and the other members shall be serving or retired Judges of any High Court:

Provided further that nothing in this clause shall authorise the detention of any person beyond the maximum period prescribed by any law made bv Parliament under sub-clause (a) of clause (7).

Explanation.-- In this clause, "appropriate High Court "means,-

(i) in the case of the detention of a person in pursuance ofan order of detention made by the Government ofIndia or an officer or authority subordinate to that Government, the High Court for the Union territory of Delhi;

(ii) In the case of the detention of a person in pursuance of an order of detention made by the Government of any State (other than a Union territory), the High Court for that State', and

(iii) in the case of the detention of a person in pursuance of an order of detention made by the administrator of a Union territory or an officer or authority subordinate to such administrator, such High Court as may be specified by or under any law made by Parliament in this behalf.';

(b) in clause (7),-

(i) sub-clause (a) shall be omitted;

(ii) sub-clause (b) shall be re-lettered as sub-clause (a); and

(iii) sub-clause (c) shall be re-lettered as sub-clause (b) and in a sub-clause as so re-lettered, for the words, brackets, letter and figure "sub-clause (a) of clause (4)", the word, brackets and figure "clause (4)" shall be substituted.