A shared understanding of the transparency-related provisions in the Paris Agreement and Decision 1/CP.21 and how the existing system could evolve, will help to lay the groundwork for this task, together with agreement on the priorities and timeline for related work to be undertaken by the APA and other UNFCCC bodies. Coherence will be needed between the different sets of modalities, procedures and guidelines for mitigation, finance and other forms of support. To achieve the aims of the Paris Agreement, the transparency arrangements will also need to be workable and efficient from a practical point of view.