This report is the third report presented by the Water Industry Forum to the Independent Pricing and Regulatory Tribunal (IPART). It covers the period from November 1997 to November 1999. The report has been prepared to assist IPART in resolving problems that may have arisen from the implementation of a net present value (NPV) based developer charges methodology for the calculation of developer charges (DC). The NPV methodology was adopted by IPART in determinations for the Sydney Water Corporation (SWC) in December 1995, and for the Hunter Water Corporation (HWC), Gosford City Council (GCC) and Wyong Shire Council (WSC) in June 1996.