The document discusses four models of regional governance in Canada: 1) Halifax Regional Municipality, formed through amalgamation in 1995; 2) Communauté métropolitaine de Montréal, a regional government established in 2002 to govern the entire Montreal metropolitan area; 3) Metro Vancouver, a regional government that includes regional special-purpose bodies and is admired for its structural arrangements; 4) Calgary Regional Partnership, a voluntary cooperation model and the most common in the US, along with special-purpose bodies for infrastructure.