Formula One's governing body has put plans to crack down on engine management systems on hold until after next week's showcase Monaco Grand Prix.
The rule clarification sent to all teams could have clipped the wings of champions Red Bull as well as other leading rivals but a spokesman for the governing FIA said it will now be reconsidered.
"I think (FIA race director) Charlie (Whiting) classed it (the systems) as moveable aerodynamics and he's possibly right," Virgin Racing team boss John Booth said at the Spanish Grand Prix.
"A ban on it would have affected us less than the leading teams because we... are quite a long way behind on the engine mapping side.
"Now it has been postponed for two races, which is a little bit disappointing," he added.
Leading teams have gained aerodynamic performance by using mapping to keep exhaust gases flowing constantly through the rear diffuser of the car even when drivers are not on the throttle.
That ensures grip, which would otherwise be momentarily lost when drivers brake.
Commentators have highlighted the irony of teams investing heavily in such systems to ensure exhaust fumes are steadily pumped out at a time when the sport is trying to position itself as 'greener' and more fuel-efficient.