LAGOS — The Dangote refinery says import licences granted to other companies have forced it to export more petrol, because holding excess stock is not commercially sustainable. Regulator data show its domestic petrol supply fell 21 per cent to 25.8 million litres a day in July, the lowest this year. Marketers told Daily Trust the Petroleum Industry Act allows imports, and analyst Ayodele Oni called on the NMDPRA to publish its import authorisations every quarter.