Hello Laxmipriya

There has always been a seperate UG procedure for stephens. Seperate registration process takes place on its own website (St. Stephen's College, Delhi) with a seperate cut off list released only once, unlike Delhi University, which releases about 10 cut off lists each year.

Also, unlike all the other colleges at DU, stephens conducts interviews of the short listed candidates who make it through the cut offs. A short aptitude is also conducted right before the interviews regarding the subject they're seeking admission into.

No other college at DU conducts interviews for admissions in UG course (except Jesus and Mary College, south campus). So yes, it has had a separate admission policy right since its inclusion in Delhi Univesity's colleges.