Is it mandatory to have registration of Digital Signature on TRACES for all type of online correction ?

Digital Signature Matrix for functionalities through online correction:

	Default Summary View	Personal Information	Challan correction (unmatched, matched)+ deductee movement	Pan correction (annexure 1)	Pan correction (annexure 2)	Add challan to statement	Interest , Levy payment	Modify/Add deductee rows	Delete/Add salary deductee rows
Online corrections (with digital signature, 2013-14 onwards)	Y	Y	Y	Y	Y	Y	Y	Y	Y
Online corrections (with digital signature, prior to 2013-14)	Y	Y	Y	N	N	Y	Y	N	N
Online corrections (without digital signature, 2013-14 onwards)	Y	N	Y	N	N	Y	Y	N	N
Online corrections (without digital signature, prior to 2013-14	Y	N	Y	N	N	Y	Y	N	N