Prior permission to land at Gympie airport

[Lead Balloon]

At post #8 of this thread vag said:

I submitted the PPR form available on the council website and was informed within an hour that one request will be valid for 12 months.

I repeat my question: If we can all submit PPR forms and be granted permission valid for 12 months, what does the PPR system actually achieve for the Council? Actually achieve.