The competent authority shall have, for the purposes of this Act, all the powers of a civil court while trying a suit under the Code of Civil Procedure, 1908, in respect of the following matters, namely:—

(a) summoning and enforcing the attendance of any person and examining him on oath;

(b) requiring the discovery and production of any document;

(c) reception of evidence on affidavits;

(d) requisitioning any public record from any court or office;

(e) issuing commission for examination of witnesses.