The Treaty also strengthens the powers of the European Parliament, consolidating its role as co-legislator and giving it additional responsibility: it elects the President of the Commission on the basis of a proposal by the European Council taking into account the results of the European elections (Article 17(7) of the Treaty on European Union).
Lepinguga suurendadakse ka Euroopa Parlamendi pädevusi, andes talle suurema kaalu kaasseadusandjana ja suurema vastutuse: ta valib Euroopa Ülemkogu ettepanekul komisjoni presidendi, võttes arvesse Euroopa Parlamendi valimiste hääletustulemusi (Euroopa Liidu lepingu artikli 17 lõige 7).