Stephe Wilks, Director Regulatory and Public Affairs for Cable & Wireless Optus, commented "The ACA's two figures are a result of uncertainty about the impact of the Weighted Average Cost of Capital (WACC). While the arguments are complex, the key issue revolves around the risk of Telstra not being paid for the USO. If the higher figure is adopted, Telstra will effectively be paid twice - because the increase in costs will not take into account the fact that an industry fund already exists to cover Telstra's costs."