Good and welcome move by IR without ID Proof during Tatkal booking.IR applies the same analogy for both ordinary booking and Tatkal booking.
Moreover to avoid fraudulent travel in the 6 nos group booking in the ordinary booking as well as Tatkal booking ,Any one should be produced original ID with photo and the other 5 members also mandatory to carry Original ID with photo or Clear Colour photocopy of the original ID.
Then only regular genuine passengers...
more... can get proper accommodation in both the booking. Otherwise the travel agency blocked all the tickets on the weekend and festival season with one ID person and 5 others without ID proof and thus genuine passengers are deprived in getting accommodation.