2017 marks the 20th anniversary of the Commission on the Limits of the Continental Shelf (CLCS), in coincidence with its 43rd session. This session has been the last before the expiration of the term of office of its current members. Elections were held in June. During this five year period, the CLCS faced great challenges: the workload of the Commission increased dramatically, stays in New York became longer, conditions of work became an issue; the complexity of the Submissions required new interpretations and more time for their consideration; new revised Submissions were made and brought new alterations in the order of Submissions on the list waiting to be analysed. This article provides some views on the work carried out by the CLCS following the election of members of the Commission at the twenty-second Meeting of States Parties to the United Nations Convention on the Law of the Sea, held in June 2012, up to December 2016, in an attempt to assess the accomplishments and challenges of the last five years.