They are appropriate for low-risk activities which, if the GBRs are followed, are unlikely to result in environmental harm. • Notifications are used for low-risk activities where SEPA does not need to decide whether to grant or refuse the authorisation, but needs to know where the activity is located, or needs to maintain a register to satisfy reporting requirements. • Registrations are used, in general, for lower risk activities where a simple assessment or on-line screening is sufficient before the activity can commence.