Section 41(2)(a) in The Competition Commission of India (General) Regulations, 2009
(a)admit evidence taken in the form of verifiable transcripts of tape recordings, unedited versions of video recording, electronic mail, telephone records including authenticated mobile telephone records, written signed unsworn statements of individuals or signed responses to written questionnaires or interviews or comments or opinions or analyses of experts based upon market surveys or economic studies or other authoritative texts or otherwise, as material evidence;