According to a professor specialising in Indian affairs at Carleton University in Ottawa, ordinary Sikhs who return to Punjab from other Indian states for personal reasons do not face legal or security problems or restrictions in Punjab (29 Oct. 1993). However, individual Sikhs who are affiliated with outlawed anti-government organizations might face prosecution for their activities (ibid.). A few years ago there was a registration requirement for foreigners and non-resident Indians who wished to stay in Punjab (ibid.). While he is not entirely certain, the professor believes that this requirement has been abolished.
The source adds that, following the assassination of Prime Minister Ghandhi in 1984, an unknown number of Sikhs residing in different Indian states returned to Punjab. While individual Sikhs have returned to Punjab for personal reasons since 1984, the professor is unaware of any available statistics on these Sikhs.
This response was prepared after researching publicly accessible information currently available to the DIRB within time constraints. This response is not, and does not purport to be, conclusive as to the merit of any particular claim to refugee status or asylum.
Reference

Professor specialising in Indian affairs, Carleton University, Ottawa. 29 October 1993. Telephone interview.