Another new regulation decreed by FISA was that, in the interest of safety, the driver's feet must be situated behind the front axle-line. This rule had been introduced in 1988 and teams were free to incorporate it if they chose, but it was only made compulsory in 1989. Designers introduced smaller and more cramped cockpits, at the expense of driver comfort. The problem was first highlighted at the opening round in Brazil, with focus on the Ross Brawn-designed Arrows cars. Both drivers, Derek Warwick and Eddie Cheever, suffered severe cramping and felt that the new regulations were in fact making it more dangerous, Cheever saying that "if (he) got sideways ... (he) simply cannot correct with the steering wheel" due to his lanky frame.