(1) Save as otherwise provided in sub-regulation (3) no employee shall, except with the previous sanction of the competent authority, give evidence in connection with any enquiry conducted by any person, committee or authority.
(2) Where any sanction has been accorded under sub-regulation:-
(a) no employee giving such evidence shall criticize the policy or any action of the Central Government or of a State Government or of the Authority, as the case may be.
(3) Nothing in this regulation shall however apply to:-
(a) evidence given at any enquiry before an authority appointed by the Government, Parliament or a State Legislature or evidence given in any judicial or magisterial enquiry; or
(b) evidence given at any Departmental enquiry ordered by or under the direction of the Government or of the Authority.