A CONSORTIUM of nine oil and gas companies is scheduled to sit down with Iranian officials on 30 April to hear their response to a proposal for a 25-year master plan for optimum gas allocation from the South Pars offshore gas field. The consortium presented its proposal earlier this year to Oil Industries Engineering & Construction (OIEC), a subsidiary of the National Iranian Oil Company (NIOC), which is in charge of supervising and co-ordinating the master plan.