All institutions of government are said to act under the sovereign's authority; the vast powers that belong to the Crown are collectively known as the Royal Prerogative. Parliamentary approval is not required for the exercise of the Royal Prerogative; moreover, the consent of the Crown must be obtained before either of the houses of parliament may even debate a bill affecting the sovereign's prerogatives or interests. While the Royal Prerogative is extensive, it is not unlimited; for example, the monarch does not have the prerogative to impose and collect new taxessuch an action requires the authorization of an Act of Parliament. The government of Jamaica is also thus formally referred to as "Her Majesty's Government". Further, the constitution instructs that any change to the position of the monarch, or the monarch's representative in Jamaica, requires the consent of a two-thirds majority of each house of parliament.