In May 2015, Steinitz was appointed Minister of National Infrastructure, Energy and Water Resources, as well as Minister in charge of the Israel Atomic Energy Commission. Two months later, after several years of delays and against very strong opposition from the Israeli left circles, Steinitz formulated the "Gas Framework", in order to enable the development of Israel's biggest gas discovery "Leviathan" (discovered in 2010), and to pave the way to future gas and oil explorations. The "Gas Framework" was approved by the Israeli government in August 2015, and by the Knesset Plenum in September 2015. Yet in March 2016 Israel's Supreme court nullified the framework stability section, and forced Minister Steinitz to amend it and bring it back to government approval. The revised framework was approved in May 2016, and the development of "Leviathan" ultimately started.