British North America Act, 1867, S. 40
40. Until the Parliament of Canada otherwise provides, Ontario, Quebec, Nova Scotia, and New Brunswick shall, for the Purposes of the Election of Members to serve in the House of Commons, be divided into Electoral Districts as follows:
Ontario shall be divided into the Counties, Ridings of Counties, Cities, Parts of Cities, and Towns enumerated in the First Schedule to this Act, each whereof shall be an Electoral District, each such District as numbered in that Schedule being entitled to return One Member.
Quebec shall be divided into Sixty-five Electoral Districts, composed of the Sixty-five Electoral Divisions into which Lower Canada is at the passing of this Act divided under Chapter Two of the Consolidated Statutes of Canada, Chapter Seventy-five of the Consolidated Statutes for Lower Canada, and the Act of the Province of Canada of the Twenty-third Year of the Queen, Chapter One, or any other Act amending the same in force at the Union, so that each such Electoral Division shall be for the Purposes of this Act an Electoral District entitled to return One Member.
3. NOVA SCOTIA
Each of the Eighteen Counties of Nova Scotia shall be an Electoral District. The County of Halifax shall be entitled to return Two Members, and each of the other Counties One Member.
4. NEW BRUNSWICK
Each of the Fourteen Counties into which New Brunswick is divided, including the City and County of St. John, shall be an Electoral District. The City of St. John shall also be a separate Electoral District. Each of those Fifteen Electoral Districts shall be entitled to return One Member.
Documents related to section 40
[Note: The federal electoral districts of the 10 provinces and the Northwest Territories are now set out in the schedule to Proclamations issued from time to time pursuant to the Electoral Boundaries Readjustment Act (Canada), as amended for particular districts by other Acts of Parliament.
The electoral district of the Yukon Territory is set out in section 30 of the Electoral Boundaries Readjustment Act (Canada).]