I like this requirement because it means I could go into a place, order a pizza, sit there starting at it for 15 minutes, and then report them for a violation. :-)
Joking aside, I'm always intrigued by these associations and legal categories that nail down specific characteristics for certain foods (or other items). A lot of them require stuff to be made in a specific geographical area, so it's cool to see this Naples pizza one focusing on the actual process rather than the location. But this is still largely about the process rather than the product. It'd be an interesting challenge to see if you could define such categories in terms of the product itself, so you could verify just based on the pizza whether it was a "real" pizza, without knowing how it was made.
I do have to wonder whether it's really worth it to go through all this rigmarole to get the official Neapolitan pizza seal of approval. In practice I find that in a fair amount of cases, the most "authentic" version of something isn't necessarily the one I like the most. And if it costs the restaurant a bunch of money to get this certification, I'm not sure it's going to be worth it to me as a customer when that cost is passed on to me. I care more about how good the pizza is than how authentic it is.
Amusingly, I once met an Italian (from the Veneto area) who loved Little Ceasar's pizza and said Italian pizza was "boring".