NEW DELHI: A cut in supply of government-controlled natural gas from legacy fields has sparked a fencing match between the oil ministry and city gas network operators who want to raise CNG prices to at least cover the higher cost of imported fuel being used to meet market demand.Government reduced legacy gas allocation for the city gas sector by 21% in October and 20% in November following a natural decline in production from old fields. This is pinching margins of companies such as Delhi-NCR...