UPDATE: Darby Says Explanation Key To MWR Reinstatements

In a demonstration of just how seriously NASCAR takes the fuel additive discovered in Michael Waltrip's intake manifold at Daytona International Speedway earlier this month, suspended crewchiefs Robby Reiser (Roush-Fenway Racing) and Kenny Francis (Evernham Motorsports) were allowed to take part in yesterday’s key Car Of Tomorrow test at Bristol Motor Speedway, while Michael Waltrip Racing crewchief David Hyder and Vice President of Competition Bobby Kennedy were not.

Nextel Cup Series Director John Darby said yesterday that it is up to team officials to apply for Hyder and Kennedy’s reinstatement. However, he also made it clear that NASCAR is not inclined to allow them back until an explanation is given for what happened at Daytona.

"A couple of weeks is obviously nowhere near long enough," he said. "If we get through a long enough time period, and maybe get a little more help on how the whole situation came together, we'll look at it at that point."