fight4justice – If I was in your situation I would immediately contact your local council and ask for their assessment of the situation. However, you may be disappointed by their reply.
(1) If a dog defecates in a public place:
(a) the owner of the dog, or
(b) if the owner is not present at the relevant time and another person who is of or above the age of 16 years is in charge of the dog at that time—that other person,
must immediately remove the dog’s faeces and properly dispose of them.
Maximum penalty: 8 penalty units.
If the lady picks up the dog ‘poo’ then she may be abiding by the laws.
As a long shot if the dog urine is substantially killing the grass on the Council property or is causing a health hazard then it may be considered a ‘nuisance dog’ under [s(e) and s(f)] of the NSW Government Companion Animals Act 1998 No 87:
(1) For the purposes of this section, a dog is a nuisance if the dog:
(a) is habitually at large, or
(b) makes a noise, by barking or otherwise, that persistently occurs or continues to such a degree or extent that it unreasonably interferes with the peace, comfort or convenience of any person in any other premises, or
(c) repeatedly defecates on property (other than a public place) outside the property on which it is ordinarily kept, or
(d) repeatedly runs at or chases any person, animal (other than vermin and, in relation to an animal, otherwise than in the course of droving, tending, working or protecting stock) or vehicle, or
(e) endangers the health of any person or animal (other than vermin and, in relation to an animal, otherwise than in the course of droving, tending, working or protecting stock), or
(f) repeatedly causes substantial damage to anything outside the property on which it is ordinarily kept.