Rex International Holding Limited announced that Rex has entered into a Joint Study Agreement with the co-founders of Helios Aragon to explore for natural hydrogen in Oman. Helios Aragon, which aims to grow a quality global portfolio of natural hydrogen and helium projects, is operator of the Monzon Natural Hydrogen Project in Spain, the first such development in Europe. There are also exploration activities underway in Poland and the UK by the Helios group of companies.