Kammala wannan jumla: An fara gabatar da Yarjejeniyar Duniya don Muhalli a cikin 2017 ta hanyar hanyar sadarwa ta duniya na sama da ƙwararru ɗari (furofesoshi, alƙalai, lauyoyi) daga ƙasashe arba'in daban-daban da yanzu aka sani da <unk> Ƙungiyar Kwararru ta Duniya don Yarjejeniyar <unk> (IGEP). Shugaban IGEP na yanzu shi ne Laurent Fabius, Shugaban Majalisar Dokokin Faransa kuma tsohon Shugaban Majalisar Dokokin Tarayya.
COP 21. Babban sakatarenta shine Yann Aguila, lauya a Bar na Paris kuma Shugaban Kwamitin Muhalli na Club des Juristes, kungiyar nazarin shari'a ta Faransa.