Such preliminary impact assessments of proposed EU legislation were further enhanced by the Treaty of Lisbon, which added provisions on the mandatory assessment of the social and environmental impact of any proposed legislation.
Aceste evaluări preliminare ale impactului propunerilor legislative ale UE au fost susţinute şi mai puternic de Tratatul de la Lisabona, care a adăugat dispoziţii privind evaluarea obligatorie a impactului social şi de mediu al tuturor actelor legislative propuse.