Earlier quoted context omitted.
> You would be extremely hard-pressed to tell "authentic" Feta cheese This is absolutely not true, at least in countries I've lived. Do I believe that someone in the USA is capable of producing very good feta? Absolutely! And I've had some. However, the vast majority of what you will find in the typical grocery stores isn't very good, majority of it notably inferior not only to the imports, but random stuff I've boug…
No offense, but there's nothing particularly special about Feta produced in Greece. Feta-style cheeses are produced across a fairly wide region in the Eastern Mediterranean, and I don't think the style is so singular that it can't be (or isn't) authentically reproduced elsewhere. More generally, I can understand consumer protections that focus on the nature of the product itself , but where the product comes from is…
This is not true and you don't know things as well as you think you do. PDO regulations absolutely focus precisely on ingredients, process and the final product.
For example, PDO regulations for feta stipulate, among other details, that it must be made with sheep's milk with the addition of up to 30% goat's milk and that the milk must come from animals born and bred in the Greek regions of Thessaly, Thrace, Epirus, Macedonia, Central Greece, Peloponse and Lesvos, from the breeds adapted to the area and reared by traditional methods. The fat content of the milk must be at least 6% w/w and the pH of the milk before the cheese is made must be at least 6.5. The milk must be made into cheese at most 48 hours after milking. The finished cheese must be aged for at least two months in brine containing 7% NaCl w/w. The final product must be a cheese "distinguished by its slightly acid and salty taste and its properties of mild lipolysis" (lipolysis imparts a piquant taste to cheese), with a maximum water content of 58%, minimum fat content of 43%, and 2% salt in water. There are more detailed instructions here:
https://ec.europa.eu/geographical-indications-register/eambr...
So the PDO regulates the provenance of the sheep milk, as well as the location the cheese is manufactured, but obviously the focus is on the quality and organoleptic characterisics of the ingredients in the specified territories, and that because the same characteristics are not reproducible in different territories (for example because the breeds of milk producing animals are different and the flora they feed on, and therefore the soil bacteria that flavour this flora, are different).
I also note that most "feta" cheese made outside Greece is actually made with cow's milk. For example, this was the case with French, German and Danish "feta" before Greece successfully defended its PDO and it is still the case today for feta made in the US. I'm not sure about Australia, but it's probably the same there. In Greece, cheese made in the same way as feta but with cow's milk is called "telemes" and is also a PDO cheese.
As far as I can tell, no "feta" cheese made outside Greece has the piquant taste imparted to cheese milk by lipases, that characterises Greek feta.