(1) If the Central Government is of opinion that any association is, or has become, an unlawful association, it may, by notification in the Official Gazette, declare such association to be unlawful.

(2) Every such notification shall specify the grounds on which it is issued and such other particulars as the Central Government may consider necessary:

Provided that nothing in this sub-section shall require the Central Government to disclose any fact which it considers to be against the public interest to disclose.

(3) No such notification shall have effect until the Tribunal has, by an order made under section 4, confirmed the declaration made therein and the order is published in the Official Gazette:

Provided that if the Central Government is of opinion that circumstances exist which render it necessary for that Government to declare an association to be unlawful with immediate effect, it may, for reasons to be stated in writing, direct that the notification shall, subject to any order that may be made under section 4, have effect from the date of its publication in the Official Gazette.

(4) Every such notification shall, in addition to its publication in the Official Gazette, be published in not less than one daily newspaper having circulation in the State in which the principal office, if any, of the association affected is situated, and shall also be served on such association in such manner as the Central Government may think fit and all or any of the following modes may be followed in effecting such service, namely:—

(a) by affixing a copy of the notification to some conspicuous part of the office, if any, of the association; or

(b) by serving a copy of the notification, where possible, on the principal office-bearers, if any, of the association; or

(c) by proclaiming by beat of drum or by means of loudspeakers, the contents of the notification in the area in which the activities of the association are ordinarily carried on; or

(d) in such other manner as may be prescribed.