This note contains draft modalities and procedures for carbon dioxide capture and storage in geological formations as clean development mechanism project activities, prepared by the secretariat in response to the request made in decision 7/CMP.6, paragraph 6. The draft draws on relevant submissions from Parties and admitted observer organizations and the outcomes of a technical workshop with technical and legal experts, held in Abu Dhabi, United Arab Emirates, on 7 and 8 September 2011. The draft modalities and procedures have been prepared with a view to facilitating the relevant discussions of the Subsidiary Body for Scientific and Technological Advice at its thirty-fifth session.