In 1920, Australian coins and banknotes were introduced, although local paper money continued to be produced until 1932.
The final result was that all the British territories apart from Fiji adopted the Australian unit.
(The result was that Fiji had a distinct pound of its own that differed in value from sterling as well as from the Australian and New Zealand units.
For a more general view of history in the wider region, see British currency in Oceania.
Prior to this regulation, the Solomon Islands used Australian and Burns Philip banknotes.