When making modifications to Oracle applications with either Oracle Database Enterprise Edition or Oracle Internet Application Server Enterprise Edition pre installed with your bundle, be aware that the licenses are considered restricted use, meaning you cannot modify, alter or change the underlying products.
These products are meant to be used out of the box – otherwise they require further software licensing requirements including the slightest modification – as minor as changing a form or report. By making these changes you move into full use status and will need to purchase an additional licensing.
Be careful out there and always be sure to check your software licensing agreements!