World leaders need to press more quickly for an overhaul of global banking regulations to help shore up the economic recovery and clarify the "rules of the game" going forward, Treasury secretary Timothy Geithner said in advance of meetings this weekend among key finance ministers and central bankers. "We want to accelerate progress on reaching and putting in place global agreement on the core reforms," Geithner said as he prepared for talks in South Korea with his counterparts from the Group of 20.