Regulator mulls ordering sale of Leviathan Antitrust Authority director general David Gilo is considering ruling that ownership of Tamar and Leviathan constitutes a cartel. By AMIRAM BARKAT MARCH 5, 2013 23:50 Site of planned natural gas plant in Be'er Tuviyah 370 (photo credit: Sharon Udasin) Related Tags noble energy delek group