Finance has just released the “Notice of Ways and Means Motion to implement certain provisions of the budget tabled in Parliament on March 29, 2012 and other measures”.  There are also “Explanatory Notes” that are helpful. 

Here are the parts relating to registered charities.in a note entitled “Charity parts of Finance Notice of Ways and Means Motion for 2012 Canadian Federal Budget”

Notice of Ways and Means Motion to implement certain provisions of the budget tabled in Parliament on March 29, 2012 and other measures
http://www.fin.gc.ca/drleg-apl/bia-leb0412-eng.asp