SO WHY DID CANADA BECOME DECENTRALIZED ANYWAY?

•	2 broad factors: constitutional change ( formal amendment, judicial interpretation, and usage/convention) and societal change (affecting the relative importance of the enumerated powers).

•	Courts (in particular, the Judicial Committee of the Privy Council, or "JCPC") recognized the "coordinate status " of provincial laws and executive powers with those of the federal Parliament; gave a narrow interpretation to the principal federal powers (the residuary power and the trade and commerce power) and a wide interpretation to the main provincial power (over property and civil rights in the province).

•	As provinces have grown and developed their own governments, powers of reservation and disallowance have fallen into dis-use.