FISA's new GT rules had developed through 1993, aligning with the ACO, IMSA and Japanese JAF, defining a GT as a road-going car on sale to the public and registered for road-use in two of the following countries: France, Great Britain, Germany, USA or Japan.Spurring 2014, p.150. To allow time for entrants to prepare, the ACO was forced to issue its own GT regulations in September 1993, before FISA had completed their work.
