Certain money subsidies are Of the net revenue of the paid annually to the provinces commonwealth from duties of towards the support of their customs and excise, not more governments and legislatures. than one-fourth shall be applied annually by the commonwealth towards its expenditure. The balance shall, in accordance with certain conditions of the constitution, be paid to the several states, or applied towards the payment of interest on debts of the several states. This arrangement is limited to ten years. Financial aid may be granted to any state upon such terms as the federal parliament may deem expedient. Western Australia may, subject to certain restrictions, impose duties on goods imported from other parts of the commonwealth. No such provision; but the For the administration of the Dominion parliament and provincial laws relating to interstate trade legislatures could by the governor-general-in-council legislation arrange a similar may appoint an interstate commission. commission. Canada is liable for amount of The parliament of the commonwealth the debts and liabilities of the may consolidate or provinces existing at the time of take over state debts by general the union, under the conditions consent, but a state shall and terms laid down in the indemnify the commonwealth, and constitution. the amount of interest payable in respect to a debt shall be deducted from its share of the surplus revenue of the commonwealth.