This is a thread with some discussion on the matter http://www.axisandallies.org/forums/index.php?topic=20629.0
And here are the rules themselves, in essence, tweaked slightly to compensate for the 6 months that have passed since.
The ANZAC pieces (Dark Grey) are used to represent the new power “UK Commonwealth”
The Commonwealth takes one turn, but has a split economy (Exactly the same as the UK Europe/Pacific split).
The Economies are:
10 IPCs : ANZAC; Capital is Sidney (all territories marked with the ANZAC roundel)
7 IPCs :Canada; Capital is Ottawa (all territoreis marked with the Canadian roundel)
The following rule changes are made to accomidate the new Commonweath power
Game Mechanics:
-Commonwealth forces may choose to conquer enemy territory on behalf of the United Kingdom power instead of themselves if they desire.
-The Commonwealth may assume control of United Kingdom territory as if it was Dutch if the UK capital in that theatre has been captured.
Setup:
Do not place United Kingdom Units in Ontario, Quebec, or Sea Zone 106 during setup. Instead follow this setup for Canada, using Commonwealth (Dark Grey) units
British Columbia - 1 Infantry
Ontario - 1 Infantry, 1 Fighter, Air Base, Minor Industrial Complex
Quebec - 1 Infantry, 1 Tank, 1 Artillery, Minor Industrial Complex
New Brunswick/Nova Scotia - Naval Base
United Kingdom - 1 Infantry
Sea Zone 123 - Destroyer
Sea Zone 106 - Destroyer, Transport
Modify the Alpha+ 2 Setup Accordingly
United Kingdom:
Gibraltar - 1 Infantry, 1 Fighter
Iceland - 1 Infantry
Sea Zone 123 - Transport
Germany:
SZ 114 - 1 Sub
ANZAC:
New Zeland - 2 Infantry, 2 Fighters, Minor Industrial Complex
National Objectives:
United Kingdom:
Replace the United Kingdom “control all original territory” objectives with:
5 IPCs for the European economy if all Canadain territories are controled, as well as Egypt and Gibraltar and Sea Zone 109 is free of enemy ships.
5 IPCs for the Pacifc economy (India) if all ANZAC territories are controled, as well as Malya and Kwangtung and Sea Zone 39 is free of enemy ships. Also the UK is at war with Japan
Commonwealth:
The ANZAC economy benifits from its normal National Objectives, these IPCs go to the ANZAC economy only. The Canadain economy can benifit from the following National Objectives:
5 IPCs if all Allied convoy zones on the European map are free of enemy ships
(Convoy zones adjacent to a currently controled Allied territory on the Europe game board)
5 IPCs if the United States is at war with the Axis Powers
Notes:
The Commonwealth conducts research and development as a single power.
The United Kingdom European economy begins the game at 21, the Pacific economy begins the game at 17.
Use ANZAC roundels (or the “union jack” roundel) to denote Canadian conquests.