On 4 July 1956, Indonesia, represented by Ambassador Soehardjo Wirjopranoto, and the Philippines, represented by Ambassador Jose Fuentebella, signed Agreement on Immigration Between the Republic of the Philippines and the Republic of Indonesia, which allowed border residents in Sangihe, Talaud, Nunukan, Balut, and Sarangani, who had passing card to cross the border to trade, visit family, worship, and travel.