Translate the following English sentence to French:
"Up until the Amsterdam Treaty, there were about 20 variations of these committee procedures, which created neither clarity in the implementation of legislation nor transparency for the citizens."
Jusqu' au traité d' Amsterdam, il existait environ 20 variantes de ces procédures comitologiques, ce qui ne contribuait ni à la clarté de l' application de la législation ni à la transparence pour les citoyens.