I live in Cordeaux Heights NSW, on a battle-axe block. The house was built in 1986 and the Duplex above our property to the left side of the back fencing line (about 9mts)had already filled in their back yard and supported the fill by putting rocks under the wooden fence line. This proved useless as all the water from rain fall etc would wash into our block, so they then put corrugated iron in front of their fence line to hold back the soil, the fence was only timber and now needs replacing. We are quite happy to pay half the costs of a new fence but they want us to also cover the cost of a retaining wall thats only purpose is to hold back the fill in their back yard. We have not changed the natural fall of the land on our side of the fence. Does the 2008 amendment to the Dividing Fences Act (sect 3c) mean that I am liable to pay half of the costs of the required retaining wall that supports their filled in back yard? I believe that I do not need to pay half the cost of the wall.