Section 727(d) in Police Regulations, Bengal , 1943
(d)The Police will present Guard of Honour to the following foreign dignitaries at the district headquarters only when such guards are specifically requisitioned by the Government of India in the Ministry of External Affairs. The venue of Guard of Honour should be at the district headquarters, the airport or the railway station as the case may be but there should be only one Guard of Honour and not two on each occasion :-(i)Visiting Heads of States;(ii)Governor-Generals of Commonwealth countries;(iii)Visiting Prime Ministers of foreign and Commonwealth countries;(iv)Heads of foreign and Commonwealth Missions of the rank of Ministers, High Commissioners, Minister Plenipotentiary accredited to India;(v)Visiting Foreign Minister of foreign and Commonwealth countries.