A windfall tax, introduced last year as energy prices soared, bringing the total tax on oil and gas producers to 75%, prompted producers such as TotalEnergies (TTEF.PA) and Harbour to cut investment in the basin, or shun the ongoing licensing round. The government recently tweaked the tax saying it will be scrapped if prices fall to normal levels for a sustained period. (Reporting by Sachin Ravikumar and Susanna Twidale; Additional reporting by Shadia Nasralla; Editing by Sarah Young, Kate Holton and Sharon Singleton)