Directives 88/661/EEC, 89/361/EEC, 90/427/EEC, 91/174/EEC, 94/28/EC and 2009/157/EC are largely similar in structure and content.
Tá struchtúr agus inneachar Threoracha 88/661/CEE, 89/361/CEE, 90/427/CEE, 91/174/CEE, 94/28/CE agus 2009/157/CE mórán mar a chéile.