This report covers the work carried out by the Joint Implementation Supervisory Committee (JISC) from 22 September 2016 to 25 August 2017. During the reporting period, the JISC ensured sufficient infrastructure and capacity for the use of joint implementation by Parties, and prudently managed its resources in response to a request by the Conference of the Parties serving as the meeting of the Parties to the Kyoto Protocol. The JISC adopted the joint implementation two-year management plan 2018–2019, reflecting its continuing commitment to provide support for the operation of the mechanism. Further, the JISC reviewed the implementation of the reliance on the clean development mechanism accreditation system.