A constructor is defined as a person, whether or not incorporated, "who owns the intellectual property rights to the
rolling chassis it currently races.."
[15]
For the 2003 season, it was suggested by the FIA (but obviously not subsequently agreed to) that:
The teams are invited to agree unanimously to delete the provision in Schedule III to the Concorde Agreement which prevents
a constructor using a component (other than an engine or a gearbox) designed or manufactured by another constructor.
[12]