Plenty of countries find ways to reserve power for groups that would otherwise be under-represented without going so far.
Mr Miliband pledged to clear up confusion over what the Welsh assembly can and cannot do, saying a Labour government would legislate so powers are assumed to be devolved "unless specifically reserved", known as a reserved power model.
The state powers are often called residual, or reserved, powers.
He made it clear that they would sometimes try to check the president's powers, mentioning the 10th Amendment, which reserves powers to the states.
It was then agreed that the colony should have full internal self-government, the governor retaining reserved powers only for foreign affairs, defense, and internal security.
From now on, the government says, it will reserve powers to itself to decide the names of places of "high public priority".
It has reserved powers to make the system legally binding under the small business enterprise and employment bill, which is working its way through parliament.
It mixes in almost entirely devolved issues such as health and transport, with reserved powers such as immigration, taxes and defence.
The suit relied on the 10th Amendment, which reserves powers not delegated to the federal government to the states or the people and which is often cited by these days by the Tea Party movement.
The basic protection for the institution of slavery was the Tenth Amendment of 1791, the reserved powers clause, which left the issue of slavery and other matters to the states.
