Clear response, thanks. Learnt something new today, namely that PPR is not something standardised in AIPs.
No, I am not keen to increase to level of regulations, we have regulations enough as it is. Bottom line: check the relevant AIP to see if there is any mention on PPR and act accordingly. Depending on your destination, this may be a phone call, a mail, or a web form that needs to be filled out prior to departure.