No person shall be arrested or prosecuted in respect of any offence under section 3 except with the previous sanction of the Central Government or such officer or authority as may be authorised by that Government by order in writing in this behalf.

No person shall be arrested or prosecuted in respect of any offence under section 3 except with the previous sanction of the Central Government or such officer or authority as may be authorised by that Government by order in writing in this behalf.