Hi Suzy
Yes I believe you can perform a pensioner verification at any time and as often as you may like.
I am not sure what value would be added by running a verification at the time of the PCS because the process is in a state of continual change, seems excessive to me.
I would recommend at least verifying data twice a year, if your council is like every other in NSW you probably get more applications in July/August than any other time. Accordingly I would recommend October prior to sending November quarterly reminders and also April to capture changes prior to the annual levy but also in time for the fourth instalment run. I think you will find two runs a year fits with best practice.
I am not aware of any legislative requirement to verify pensioner information, but there is a requirement for only those who are eligible pensioners to receive a rebate which kind of saying that some sort of verification should be performed.
I hope this is helpful, let me know if you need anything further.
Regards,
Andrew