Under Australia's COVID-19 travel ban, only the "immediate family" of an Australian citizen or permanent resident is allowed to enter the country.
Parents weren't initially considered under the travel rules to be immediate family, but a change in exemptions could see them allowed into Australia.
Prime Minister Scott Morrison announced on Friday that parents of Australian citizens and permanent residents will now be classified as immediate family, allowing them to travel to states and territories that have reached 80 per cent double dose vaccination targets.
In New South Wales, it will mean parents will be allowed to enter Sydney from 1 November if they are fully vaccinated. They will not have to undergo hotel quarantine.