A business operator has the ability now to refuse entry or service to a customer as long as anti-discrimination rules are not breached. Excluding an individual by vaccination status without a public health order however will be a question of whether the rule is reasonable, necessary, and proportionate.
The Covid situation took a turn for the worse, as spiralling infections saw new lockdowns introduced in Australia. The government has suggested all restrictions can be lifted once 70% of the adult population has been fully vaccinated. Until then, the outlook for economic activity levels has deteriorated.