Conversation so far:
where to get a proof of age card nsw
Visit a service centre and apply in person for your NSW Photo Card.
what is a NSW Photo Card used for
A NSW Photo Card can be used as photo identification if you don't have a NSW Driver Licence.
can you have a NSW Photo Card and a NSW Driver Licence
You can hold both a driver licence and a Photo Card if you wish.
do you have to have a NSW Photo Card
The Photo Card is voluntary – you don't have to have one, but if you don't have any other kind of photo identification, you may find it useful.

Question: what are the requirements for it
Self-contained rewrite: what are the requirements for a NSW Photo Card