Hi my parents live on a rural probity and have owened it for 35 years ..back when they first brought the block they tried putting water bores down and failed twice ..there is no town water to the property so as soon as they built the house they brought a rain water rain water tank and tried making do with this but it wasn't enough for 3 kids and 2 adults...so they brought 2 kms of black polls pipe and ran it from a freshwater spring witch gravity feed to the house and this is how it's been for 33 years ..they backed onto camping reserve and now it's changed to native title ... if someone was to tell them they had to stop using this could they fight this in court and claim squatters rights or something along them lines and win ?