1. Project Nexus Workgroup – Invoicing 11 th August 2014

2. Background  Currently several charges are raised through Ad Hoc invoices, the industry requirement is to incorporate these charges within the main invoice.  The RbD mechanism will cease for transportation and energy charges at Go Live as all supply points become subject to individual reconciliation  The RbD mechanism will continue in use for 12 months after Go Live to process reconciliations and / or adjustments to energy for the relevant period prior to Go Live  This presentation outlines the changes to the invoicing arrangements as the industry moves from pre to post Nexus settlement regime  This presentation does not include any details on the new invoice formats, supporting data etc, this will be provided later

3. Transition Invoicing Charge calculation up to Go Live will be completed in current systems and issued using current file formats even though the invoices will be issued after Go Live Charge calculation from Go Live will be based upon the Nexus modifications and other industry requirements –E.g. smaller supply point reconciliation charges will apply from Go Live The invoice issue timescales defined in UNC will be adhered to. In the event an invoice issue timescale is challenging as a result of Nexus implementation we will bring the matter to the Nexus workgroup for discussion

4. Changes to invoice documents A number of invoice documents are amalgamated post Go Live. –Charges for Unique Sites and CSEPs will be incorporated within the Commodity, Capacity and Amendment invoices –The reconciliation invoice becomes the Amendment Invoice incorporating reconciliation and adjustment charges (some of which are currently issued via Ad Hoc invoices) –Ad Hoc charges still need to be raised although these will be issued on the Ancillary Invoice. –Ratchet charges, currently invoiced on the Commodity Invoice will be included within the Capacity Invoice