Tertiary: D - Electricity, gas, steam and air conditioning supply
35 - Electricity, gas, steam and air conditioning supply
https://globalarbitrationreview.com/article/hungarys-mol-brings-new-claim-against-croatia (requires subscription)
https://www.iareporter.com/articles/hungarian-mol-lodges-second-ect-icsid-arbitration-against-croatia-prolonging-the-parties-decades-old-legal-battles/ (requires subscription)