An EGTC may be made up of members located on the territory of only one Member State and of one or more third countries neighbouring that Member State, including its outermost regions, where the Member State concerned considers that EGTC to be consistent with the scope of its territorial cooperation in the context of cross-border or transnational cooperation or bilateral relations with the third countries concerned.
Féadfaidh EGTC a bheith comhdhéanta de chomhaltaí atá lonnaithe ar chríoch Ballstáit amháin agus de thríú tír amháin nó níos mó atá i gcomharsanacht an Bhallstáit sin, lena n-áirítear na réigiúin is forimeallaí, i gcás ina measann an Ballstát lena mbaineann go bhfuil EGTC comhsheasmhach le raon feidhme a chomhair chríochaigh i gcomhthéacs an chomhair trasteorann nó thrasnáisiúnta nó a chaidrimh dhéthaobhaigh leis na tríú tíortha lena mbaineann.