Are referendum results binding?

Article 54.

…

a Bill for an Act of Parliament under this Article shall not be passed by Parliament unless —

(i) at the final voting thereon in each House it is supported by the votes of not less than two thirds of all the members of each House; and

(ii) the Bill, after its passage through both Houses, has been submitted to the electors qualified to vote for the election of members of the House of Assembly and, on a vote in such manner as Parliament may prescribe the majority of the electors voting have approved the Bill.