Section 132(1) in The Central Goods and Services Tax Rules, 2017
(1)The [Authority,] [Inserted by Notification No. G.S.R. 457(E), dated 28.6.2019.] [Director General of Anti-profiteering] [Substituted 'Director General of Safeguards' by Notification No. G.S.R. 611(E), dated 6.7.2018 (w.e.f. 19.6.2017).], or an officer authorised by him in this behalf, shall be deemed to be the proper officer to exercise the power to summon any person whose attendance he considers necessary either to give evidence or to produce a document or any other thing under section 70 and shall have power in any inquiry in the same manner, as provided in the case of a civil court under the provisions of the Code of Civil Procedure, 1908 (5 of 1908).