Ladders at YSSY

[Jayden Laing]

Hi,
Question? Are ladders allowed up at the perimeter fence as long as they are 3 metres back from the fence? Today I was at the mound spotting with my ladder up near the fence. I was well & truly 3 metres back from the fence taking photos when an Airside guy told me to take down my ladder. I questioned it as I thought ladders are allowable with the 3 metre rule. He also said that the security people don't allow them.
Any help on this matter would be greatly appreciated.
Cheers,
Jayden