Both Ukraine and all EU member states are signatories of the Energy Charter Treaty (ECT), a legally-binding treaty negotiated following the 1991 Energy Charter political declaration of principles for international energy including trade, transit and investment.
Ukraina dan semua negara anggota Uni Eropa telah menandatangani Energy Charter Treaty (ECT), perjanjian yang telah dinegosiasikan setelah deklarasi politik Piagam Energi 1991 mengenai prinsip untuk energi internasional termasuk perdagangan, transit, dan investasi.