Translate the following English sentence to French:
"These amendments refer mainly to the modus operandi of the board of directors, the provision of technical assistance by the Centre to the aforementioned countries and the Centre's help with evaluation procedures at national, European and international level."
Ces amendements concernent principalement le mode de fonctionnement du conseil d' administration, l' octroi par l' Observatoire d' une assistance technique aux pays précités ainsi que la contribution de l' Observatoire aux procédures d' évaluation aux niveaux national, européen et international.