After the realization of Maastricht Treaty and Treaty of Amsterdam, it was the lead of the Val Duchesse being formally introduced into the European Union and became the source of bindings.

• 九0年代为欧洲社会对话机制发展之黄金时期，马斯垂克条约及阿姆斯特丹条约的生效，使得该机制正式纳入欧洲联盟之体制中，并取得法源依据。