Australia's international covid certificate

At the risk of a tautology, Australia is not included in the list of countries in the EU DCC program because Australia does not issue certificates that are compatible with the EU DCC standard.

Here is the list of the 33 non-EU states (which as you have mentioned above, include New Zealand) that do issue such certificates.

For Australia to do so, it would have to issue QR codes that meet the EU standards (here are the technical details) so that when you scanned an Australian QR code with an EU scanning app, it would show up as valid. (And vice versa -- Australian QR scanning apps would be required to successfully scan all EU and any EU DCC-compatible QR codes).

As the article says, it's not insurmountable (the UK for example joined in late October and New Zealand in mid-November, both obviously well after their vaccination programs had begun) but it does require work and negotiation to make the certificates compatible.

Because the Australian government has not shown any interest in getting EU-compatible vaccine certificates. The EU Digital COVID Certificate system is open to other countries and as mentioned, many non-European countries have joined. But it is up to each country to sign up or not, and Australia has not.

Maybe there is something going on in the background though, who knows? Contact your politicians and ask they why they haven't taken up EU's offer?

Thanks Guys

So how would that look like for me if say I travelled to Spain in April- would I have issues in restaurants/venues and so on.
I believe entering Spain from Australia is straightforward enough with no restrictions.

Cheers