Under the EC Treaty, Members of the Commission must make a solemn declaration, when commencing their duties, that they will honour their obligations of membership, during their term of office and after it has ended, and behave with integrity and discretion, in the acceptance, after their term of office has ended, of certain appointments or benefits.
Selon les traités instituant la Communauté européenne, les membres de la Commission prennent, lors de leur installation, l'engagement solennel de respecter, pendant la durée de leurs fonctions et après cessation de celles-ci, les obligations de leur charge, notamment les devoirs d'honnêteté et de délicatesse quant à l'acceptation, après cette cessation, de certaines fonctions ou de certains avantages.