This document describes the potential responsibilities of the National GHG Inventory Coordinator (NIC), depending on existing institutional arrangements and national circumstances. It also specifies the qualifications that the NIC ideally will possess in order to effectively manage and coordinate development of a National GHG Inventory.  This document is part of GHG data repository tool, which key members of a national inventory team may use to design and develop a sustainable inventory system. Specifically, the NIC is encouraged to use this guide with Template 2: Institutional Arrangements, in which the NIC may indicate the designated inventory agency and inventory stakeholders (including the NIC, itself).