Formula 1 tyre supplier Pirelli says that a request over the maximum length of stints was rejected by the sport towards the end of the 2013 season.
Sebastian Vettel suffered a tyre failure on the penultimate lap of the Belgian Grand Prix, having been attempting a one-stop strategy, and had run 27 laps on the Prime tyre up until that point.
Vettel was critical of Pirelli after the race but the Italian company hit back, claiming that under a rejected 2013 proposal it would have implemented a maximum suggestion of 22 laps at Spa-Francorchamps.
"In November 2013, Pirelli requested that there should be rules to govern the maximum number of laps that can be driven on the same set of tyres, among other parameters to do with correct tyre usage," read a statement issued by Pirelli.
"This request was not accepted. The proposal put forward a maximum distance equivalent to 50% of the Grand Prix distance for the Prime tyre and 30% for the Option.
"These conditions, if applied today at Spa, would have limited the maximum number of laps on the Medium compound to 22."