Pakistan's top economic official has not ruled out a new International Monetary Fund (IMF) loan after one expires at the end of this year, in the event of failure to mobilise resources and promote growth. U.S. ally Pakistan turned to the IMF for an emergency package of $7.6 billion in November 2008 to avert a balance of payments crisis and shore up reserves. The loan was increased to $11.3 billion in July last year. Abdul Hafeez Shaikh, adviser to the prime minister on finance, said the IMF could be a source of funds if the country could not generate its own resources to repay the $11.3 billion. "This is not unusual, that you go into a follow-up programme to pay the money back," Shaikh told a news conference late on Wednesday. "I don't want to say it's an issue at this point of time but it depends on our own resource mobilisation," he added. The programme lasts until the end of this year and repayment will begin in the 2011/12 (July-June) fiscal year and should be complete by the 2015/16 fiscal year. Shaikh, who is de facto finance minister but cannot hold that post as he is not a member of parliament, expressed optimism over the release of the fifth tranche of the current loan, worth about $1.15 billion, as the IMF board prepares to meet on Friday to review Pakistan's performance. "Obviously, if we reach a stage where your case is going to the board then that itself, I think, points to a positive outlook," he said. "Of course, we are very hopeful that the outcome will be positive," he said. The tranche has been due since the end of March but has been delayed by disagreements over the introduction of a value-added tax (VAT) and the raising of the power tariff. Shaikh said the power tariff, which has been raised by more than 16 percent since October, would go up another 6 percent but it had yet to be decided when the increase would be implemented. The IMF said last month Pakistan would roll out the VAT on July 1, the first day of the new fiscal year, but analysts say they are sceptical about its impact because the government has not done enough to make taxpayers, or even tax collectors, aware of what it entails. Pakistan is due to announce its budget for the 2010/11 fiscal year next month. Pakistan is battling al Qaeda-linked Islamist insurgents while struggling with a chronic power shortage, stubborn inflation and a dearth of investment. Rolling power cuts for at least several hours a day across the country cripple industry, including textile mills which generate about 60 percent of exports, and enrage the public. Violent protests by frustrated workers and citizens occasionally break out. An opposition party leader has threatened to launch protests against rising prices and power cuts.