Pushpita Das, Free Movement Regime: A Unique Feature of the India-Myanmar Border, Manohar Parrikar Institute for Defence Studies and Analyses, 17 January 2024. "Accordingly, on 26 September 1950, the Ministry of Home Affairs (MHA) published the Notification no. 4/15/50-F.I amending the Passport (Entry into India) Rules of 1950 whereby the ‘hill tribes, who is either a citizen of India or the Union of Burma and who is ordinarily a resident in any area within 40 km (25 miles) on either side of the India-Burma frontier’ were exempted from the carrying passport or visa while entering into India."