These provisions are as under : The "3. Appointment of Commission. (1) The appropriate Government may, if it is of opinion that it is necessary so to do, and shall, if a resolution in this behalf is passed by each House of Parliament or, as the case may be, the Legislature of the State, by notification in the Official Gazette, appoint a Commission of Inquiry for the purpose of making an inquiry into any definite matter of public importance and performing such functions and within such time as may he specified in the notifications and the commission so appointed shall make the inquiry and perform the functions accordingly: Provided that where any such Commission has been appointed to inquire into any matter (a) by the Central Government, no State Government shall, except with the approval of the Central Government, appoint another Commission to inquire into the same matter for so long as the Commission appointed by the Central Government is functioning; (b) by a State Government, the Central Government shall not appoint another Commission to inquire into the same matter for so long as the Commission appointed by the State Government is functioning, unless the Central Government is of opinion that the scope of the inquiry should be extended to two or more States.