This Statement of Proposal contains amendments to the Rules and associated changes to the Registry. The proposed amendments respond to recommendations from audits, build on experience with the operation of the Rules and the Registry in the five years since go-live, and benefit from the input of an industry working group (the RAPT). The Statement of Proposal describes the proposals that were discussed by the RAPT and provides technical detail on Registry amendments and suggested drafting for rule amendments. It includes, for reference, the proposals that were not supported by the RAPT, to ensure that other stakeholders have an opportunity to comment on these proposals.