The net costs of the USO increase due todecreasing volumes, while the statutory obliged service levels as mentioned above remain the same,"the company explained. OPTA will review the PostNL application. After determining the net costs, they need to bedivided over the postal companies in the Netherlands. As a provider of postal services that alsofall outside the USO, PostNL is one of these companies. The application is based on PostNL's financial results in 2011. The company said it does notforesee to adjust the expected results on the basis of this application.