Section 145 of the Constitution Act, 1867

Royal Proclamation which brought the Act into force on July 1, 1867

Section 145 of the Constitution Act, 1867 (French: article 145 de la Loi constitutionnelle de 1867) is a repealed provision of the Constitution of Canada which required the federal government to build a railway connecting the River St. Lawrence with Halifax, Nova Scotia.

The Constitution Act, 1867 is the constitutional statute establishing Canada as a federation. Originally named the British North America Act, 1867, the Act continues to be the foundational statute for the Constitution of Canada, although it has been amended many times since 1867. It is now recognised as part of the supreme law of Canada.