India has unilaterally introduced compulsory identity card system for Nepalis entering India through 'Chhoti' transits, a newspaper report said on Monday.

As per the new rule, Nepali nationals have to produce identity card or other documents identifying themselves while entering India from the transit point and inform Indian security officials where they are going and why.

more news in http://www.nepalkhoj.co.nr

I thought this has been the case for past five or ten years. If you go to Darjeeling through Pashupati Nagar border, they will ask for your ID, register your place of residence in Nepal, intended place of visit in India and reason of the visit.