An environmental permit can be surrendered if the holder of the permit no longer needs it or they want to reduce the area of land covered by it. The latter is done by a partial surrender and the existing permit conditions may consequently have to be altered by the regulator. There are two different methods of surrender—notification or application to the regulator. Notification to the regulator is limited to operators of Part B installations (except to the extent they relate to a waste operation), mobile plant, solvent emission activities, stand-alone water discharge activities, stand-alone groundwater activities, stand-alone flood risk activities (except where a permit condition operates beyond the time when the activity is complete), medium combustion plant, and specified generators. Any other operators wishing to surrender their permit must do so by application, which must then be accepted