PCN - Confused by parking sign...

[Jamberson]

This looks like a possible wrong contravention code. This is not a P&D situation, right? It's free for non-permit holders. You have been ticketed for displaying an invalid permit.

So the first question is, did you have a parking permit of any sort on display? If not, and this is free open-access parking, I would wait for the NTO then appeal formally on the grounds that the contravention did not occur. (This assumes they reject your initial appeal of course.)

[Jamberson]

If you had no permits on display and didn't require one, then the contravention code is wrong. You can park there without a permit or ticket - you are entitled to. All you could be ticketed for would be overstaying - contravention code 30. There doesn't seem to be any justification for contravention code 19.

There is a good chance they will reject your appeal, since it probably addresses the wrong issue. If so, they will issue you a Notice to Owner (assuming you are the registered keeper) and at that point you can make a formal representation - another appeal, in other words. At that point you can write and appeal on the basis that the contravention did not occur. Can't see how they can disagree.