22 February 2018: The Paris Agreement on climate change has reached 175 Parties. With 22 more ratifications, the Paris Agreement will have the same number of Parties as the UNFCCC, which, with 197 Parties, is nearly universal.

Since November 2017, five countries have joined the treaty: Burundi (17 January 2018), the Democratic Republic of the Congo (13 December 2017), Macedonia (9 January 2018), Montenegro (20 December 2017) and Trinidad and Tobago (22 February 2018). [Status of Ratification of Paris Agreement]

Parties to the Convention that are not Parties to the Paris Agreement are able to attend the CMA as observers, but without the right to participate in the decision making process.

On 5 October 2016, the Paris Agreement achieved the threshold for entry into force. The treaty entered into force on 4 November 2016. The first session of the Conference of the Parties serving as the Meeting of the Parties to the Paris Agreement (CMA 1) took place in Marrakech, Morocco, from 15-18 November 2016. The second part of the CMA first session (CMA 1-2) convened during the 23rd session of the Conference of the Parties (COP 23) to the UNFCCC in Bonn, Germany, from 6-17 November 2017. Parties to the Convention that are not Parties to the Paris Agreement are able to attend the CMA as observers, but without the right to participate in the decision making process. [IISD RS Coverage of UN Climate Change Conference]