County of Middlesex

Regional Municipalities of Halton and Peel, the Counties of Haliburton, Hastings, Northumberland, Peterborough, Prince Edward, Simcoe, and Victoria, the Regional Municipalities of Durham and York, and the District Municipality of Muskoka

Counties of Wellington, Bruce, Dufferin, and Grey

Counties of Glengarry, Prescott, Russell, Stormont

EAST:  Counties of Dundas, Frontenac, Grenville, Lanark, Leeds, Lennox and Addington, Renfrew, the Regional Municipality of Ottawa and Carleton

NORTH:  Territorial Districts of Ontario consisting of Algoma, Cochrane, Parry Sound, Kenora, Rainy River, Sudbury, Timiskaming, and Thunder Bay

County of Huron

County of Brant, the Regional Municipalities of Hamilton-Wentworth and Niagara and that part of the Regional Municipality of Haldimand-Norfolk that, on the 31st day of March 1974, was the County of Haldimand

Counties of Essex, Kent, Lambton

Counties of Elgin, Oxford, and that part of the Regional Municipality of Haldimand-Norfolk that, on the 31st day of March 1974, was the County of Norfolk

County of Perth, the Regional Municipality of Waterloo and the City of Waterloo