The full AHPPC statement is worth reading:
The Australian Health Protection Principal Committee (AHPPC) has reviewed the current COVID-19 situation in Australia and revised the need for mandated mask wearing in certain settings. The AHPPC notes that all states and territories have relaxed mask mandates in most settings within the community and considers that it is no longer proportionate to mandate mask use in airport terminals. The AHPPC proposes that mask wearing in airport terminals no longer be mandated from as early as midnight 17 June 2022.
The AHPPC continues to recognise the role of masks, along with other public health measures, in minimising COVID-19 and influenza transmission and protecting the broader community, including those who are unable to get vaccinated and people who have a higher risk of developing severe illness. In light of this, the AHPPC continues to strongly recommend continued mask wearing in airport terminals and other indoor settings, especially where physical distancing is not possible.
Mask use is still strongly recommended, and the effectiveness of masks to help prevent the spread is acknowledged.