Colony of Staits Settlements and Sultanate of Johore, Straits Settlement and Johore Territorial Waters Agreement of 1927 (1927)
“ Article I The boundary between the territorial waters of the Settlement of Singapore and those of the State and Territory of Johore shall, except as hereafter specified in this Article, be an imaginary line following the centre of the deep-water channel in Johore Strait, between the mainland of the State and Territory of Johore on the one side and the Northern Shores of the Islands of Singapore, Pulau Ubin, Pulau Tekong Kechil, and Pulau Tekong Besar on the other side. ”
