James Moore, the Minister of Canadian Heritage, has introduced a bill that will do Canada's part in changing the rules of Royal Succession. The main change being made is to let the first-born, whether male or female, inherit the throne. The bill also removes the prohibition in the 300-year-old rules that prevents a Royal from marrying a Roman Catholic.
Since Prince William and Kate are expecting a baby in July, there is some impetus to get the 16 realms which have Queen Elizabeth as their head of state to formalize the changes quickly.
There has been some discussion about whether the changes would require a constitutional amendment, which would mean getting approval from the provinces, which could take a while. The Conservatives seem to be going on the assumption that since the provinces haven't said anything since the Commonwealth heads agreed to the changes two years ago, then they don't have any objections.