6. The Government of the Federated Malay States may, with the approval of the Legislative Council —
construct or authorize to be constructed over or in and across the Straits, which divide the territory of the Colony from the territory of the State of Johore, a causeway or embankment, in accordance with a plan to be approved by the Legislative Council, suitable for the passage of railway traffic;
construct or authorize to be constructed on such causeway or embankment, as the case may be, a railway by way of extension of the said Singapore Railway and such roadways and footways as to the Government of the Colony seem expedient; and
carry on or authorize to be carried on railway and other traffic upon and over the said causeway or embankment.