This technical paper was prepared to support the Conference of the Parties serving as the meeting of the Parties to the Kyoto Protocol at its eighteenth session in its consideration of the functioning and operation of the processes and institutions under the clean development mechanism in the future. For each process under the clean development mechanism, the paper presents information on its background, the status and an analysis of its functions, and considerations for its future operations. The paper also suggests appropriate time frames for the cessation of processes that would avoid a gap before the operationalization of the corresponding processes under the mechanism established by Article 6, paragraph 4, of the Paris Agreement.