Section 4. For sections 20 and 21 of the principal Act, the following sections shall be substituted, namely:

4. For sections 20 and 21 of the principal Act, the following sections shall be substituted, namely:— "20. (1) The State Government may, by notification in the Official Gazette, appoint such persons as it thinks fit, having the prescribed qualifications, to be Government Analysts for such areas in the State and in respect of such drugs or class of drugs as may be specified in the notification. (2) The Central Government may also, by notification in the Official Gazette, appoint such persons as it thinks fit, having the prescribed qualifications, to be Government Analysts in respect of such drugs or class of drugs as may be specified in the notification. (3) Notwithstanding anything contained in sub-section (1) or sub-section (2), neither the Central Government nor a State Government shall appoint as a Government Analyst any official not serving under it without the previous consent of the Government under which he is serving. Inspectors.