Bond Washing V/s. Short Term Capital Gain Loss

If during course of Assessment an AO finds ST Capital Loss in assessee's return can he disallow the loss so claimed under the pretext of 94(7)  ..........???? means from sources he can find the record date of the scrpis so sold & if they fall within range of 3-9 months (as they are likely to fall) and disallow the loss to the extent (cost - sale consideration - dividend received)  THE MATTER DOES NOT SEEMS TO BE SUBSTANTIAL BUT PLEASE IF ANYONE CAN GUIDE