The Paris Agreement Implementation and Compliance Committee (PAICC) was established in the Paris Agreement to facilitate its implementation and promote compliance. Under the Paris Agreement, Parties have procedural obligations to communicate and maintain Nationally Determined Contributions; submit a mandatory report or communication of information; participate in the facilitative multilateral consideration of progress and submit a mandatory communication of information and participate in their review. This explainer reviews the functions of the PAICC and its latest work regarding NDC 3.0 submissions.