for appropriation bills, a message to the house from the governor-general recommending the purpose of the appropriation in accordance with section 56 of the constitution must be announced before the bill is introduced. a further message must be received before any amendment can be moved which would increase, or extend the objects and purposes or alter the destination of, a recommended appropriation. this requirement in effect prevents private members from moving such amendments. however, a private member may move to reduce the amount of a proposed expenditure or may move to omit items.