Contract variations (or amendments) can occur for many reasons including circumstances that give rise to new legal requirements e.g. health and safety (Partnerships Victoria 2001a: p.135). As part of its statutory responsibilities, the Office of the Director, Melbourne CityLink commissioned a public safety and traffic management review of CityLink during 2002 (VicRoads 2009a), which focused upon a number of inspections relating to road and tunnel safety, incident reports, assets, and simulated 'desktop' emergency management procedures (Transurban 2008: p.25; Office of the Director, Melbourne CityLink 2002). The review found that "high standard[s] of [public] safety [were delivered] by CityLink and its contractors" (Transurban City Link 2003: p.15; Office of the Director, Melbourne CityLink 2002: p.IV) and therefore concluded that CityLink was "safe" to use (Office of the Director, Melbourne CityLink 2002: p.46). Although no serious issues were identified, adverse findings could potentially have led to changes to current practices.