The 2007 Super Aguri is based on a re-worked RA106 chassis used by Honda F1 in the 2006 Formula One season. It has been the basis of a complaint filed by Spyker F1 against Super Aguri F1. It is believed that the protest is related to articles 2.1, 2.2 and 6.3 of the F1 sporting regulations. Article 6.3 of the F1 sporting regulations states: "The constructor of an engine or rolling chassis is the person (including any corporate or unincorporated body) which owns the intellectual property rights to such engine or chassis." Since Super Aguri owns the intellectual property rights, they claim that the car is within the rules. Indeed, the Honda F1 RA106 was sold to PJUU Inc, and Super Aguri F1 acquired the rights through them and thereafter modified the package to meet the technical regulations for the 2007 season.

There is also another issue of the team's possible violation of the Concorde Agreement. Both Spyker and Williams claim that Super Aguri (and both Red Bull teams) have broken Schedule 3 of the Agreement which states: "A constructor is a person (including any incorporated or unincorporated body) who owns the intellectual property rights to the rolling chassis it currently races, and does not incorporate in such chassis any part designed or manufactured by any other constructor of F1 racing cars except for standard items of safety equipment, providing that nothing in the Schedule 3 shall prevent the use of an engine or gearbox manufactured by a person other than the constructor of the chassis." Spyker and Williams believe that if the SA07 does indeed use components designed by Honda, they would be in violation of the Concorde Agreement. The issue is yet to be clarified and the FIA will not be permitted to take action against a team curtailing the Concorde Agreement until the issue has been resolved in a court of law. Super Aguri maintains their innocence in this issue, though the matter is still of great contention.

...
Wikipedia