Drivers will only be able to use the much-vaunted Drag Reduction System - or adjustable rear wing - until part way along the longest straight at Shanghai International Circuit at this weekend's Chinese Grand Prix.
It had been rumoured that the technology, introduced for 2011 in a bid to increase overtaking, might be made available for the full length of the straight, the second longest on the calendar, but teams and drivers advised against it after the restricted zone worked well at Sepang last weekend.
As a result, the FIA has confirmed that DRS can only be activated with 902m of the 1170m stretch remaining before the turn 14 hairpin, and again only if the chasing car is within a second of its prey at the designated point in turn twelve. Renault technical director James Allison was among those who warned the FIA that it should stick to its policy of limiting the area in which DRS could be used.
"It was good to see lots of overtaking [in Malaysia]. and I think the FIA got the DRS settings just about right in Sepang," he said before the announcement, "For China, they will need to choose the DRS activation point carefully, because the DRS straight is around three hundred metres longer compared to Sepang."
Despite the limitation on its use, Jenson Button, who finished second in Malaysia, believes that China could see DRS being used to its fullest potential in China, and hopes that it will help McLaren close the gap on Red Bull Racing at the front of the field.
"Along the massive back straight, even without DRS, I still think there'll be plenty of opportunity for overtaking - especially if we see the same sort of close racing as we witnessed in Malaysia," the Briton commented to MSN
, "If that's where they put the DRS zone for the race, then I think we'll see some spectacular passing - and possibly even re-passing - down that back straight."