Under the Australian Consumer Law (ACL) a business must not supply goods if:
the goods have more than one displayed price - 'contain multiple prices'; and
the supply takes place for a price that is not the lowest of the displayed prices.
A business who displays the same good with more than one price – ‘with multiple prices’ – must:
sell it for the lowest displayed price; or
withdraw the goods from sale until the price is corrected.
'Displayed price'
A ‘displayed price’ is a price, or any representation that may reasonably be inferred to be a representation of a price that is:
attached to or on:
the goods
anything connected or used with the goods
anything used to display the goods
published in a catalogue available to the public, when:
the deadline to buy at that price has not passed
the catalogue is not out-of-date
that price applies only to the goods at a specific location or in a specific region, or
that reasonably appears to apply to the goods, including a partly-obscured price.
A price is not a ‘displayed price’ when it is:
entirely obscured by another price
a price per unit of measure and shown as an alternative means of expressing the price
not in Australian currency, or unlikely to be interpreted as Australian currency.
A displayed price published in a catalogue or advertisement that is incorrect, can be corrected by publishing a retraction to a similar circulation or audience to the original advertisement.