Supply (political science)

In the Westminster system (and, colloquially, in the United States), a money bill or supply bill is a bill that solely concerns taxation or government spending (also known as appropriation of money), as opposed to changes in public law.

It is often a constitutional convention that the upper house may not block a money bill. There is often another requirement that non-money bill-type clauses may not be attached to a money bill. The rationale behind this convention is that the upper house, being appointed or indirectly elected, should not have any right to decide on taxation and public expenditure-related policies as may be framed by the directly elected representatives of the lower house. Therefore, money bills are an exception to the general rule that for a bill to be enacted into a law, it has to be approved by both Houses of the Parliament—the lower house and the upper house.

Loss of supply in the lower house is conventionally considered to be an expression of the house's loss of confidence in the government resulting in the government's fall.

A supply bill in the Australian System is required to pass the House of Representatives, the Senate and be signed by the Governor-General. The Senate has no power or ability to introduce or modify a supply bill, but has the ability to block or defer the passing of a supply bill. The most famous instance where supply was blocked was during the 1975 constitutional crisis. This has resulted in agreements between political parties to prevent the blockage of supply bills through the Senate.

A money bill is specifically defined by Article 81 of the Constitution of Bangladesh. The President of Bangladesh can send back all bills passed by the Parliament for a review except a money bill. However, a money bill can be introduced to the Parliament only at the President's recommendation. Additionally, tax can only be levied by the Parliament.

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