In the 2007 season, for the first time since the 1981 rule, two teams used chassis built by other teams. Super Aguri started the season using a modified Honda Racing RA106 chassis (used by Honda the previous year), while Scuderia Toro Rosso used the same chassis used by the parent Red Bull Racing team, which was formally designed by a separate subsidiary. The usage of these loopholes was ended for 2010 with the publication of new technical regulations, which require each constructor to own the intellectual property rights to their chassis, which prevents a team using a chassis owned by another Formula One constructor. The regulations continue to allow a team to subcontract the design and construction of the chassis to a third-party, an option used by the HRT team in 2010 and Haas currently.