Until the imposition of uniform duties of customs:
the Commonwealth shall credit to each State the revenues collected therein by the Commonwealth;
the Commonwealth shall debit to each State:
the expenditure therein of the Commonwealth incurred solely for the maintenance or continuance, as at the time of transfer, of any department transferred from the State to the Commonwealth;
the proportion of the State, according to the number of its people, in the other expenditure of the Commonwealth;
the Commonwealth shall pay to each State month by month the balance (if any) in favour of the State.