Anyone caught not wearing a mask at airports in Western Australia will now cop a fine of up to $50,000 as part of drastic measures to stop a mutant strain of Covid from reaching the state.
Last week state and territory leaders agreed to enforce mandatory masks on all flights across Australia.
WA Premier Mark McGowan further tightened measures for his state, announcing masks must be worn not only on planes, but inside every airport across WA.
The new measures were introduced to stop the spread of a mutant strain of Covid which plunged the UK into a third lockdown.
A cleaner at the Hotel Grand Chancellor in Brisbane tested positive to the highly-contagious strain of the virus last week.
Despite the risk of fines coming into effect on Wednesday, dozens of passengers not were seen inside Perth Airport without masks on, The West Australian reports.
The new rules apply to anyone over the age of 12, although people are allowed to take their masks off to eat, drink or take medication as long as they are sitting down.
Masks don't have to be worn when interacting with someone who is deaf or 'where visibility of mouth is essential for communication.'
People who work alone in offices, or are sole occupants of vehicles within airports are also exempt.