"Council Decision of 20 May 1999 concerning the definition of the Schengen acquis for the purpose of determining, in conformity with the relevant provisions of the Treaty establishing the European Community and the Treaty on European Union, the legal basis for each of the provisions or decisions which constitute the acquis".
اطلع عليه بتاريخ 01 نوفمبر 2014.  الوسيط |تاريخ الوصول= تم تجاهله (مساعدة); الوسيط |المسار= تم تجاهله (مساعدة); الوسيط |العنوان= تم تجاهله (مساعدة); الوسيط |التاريخ= تم تجاهله (مساعدة) "Council Decision of 20 May 1999 concerning the definition of the Schengen acquis for the purpose of determining, in conformity with the relevant provisions of the Treaty establishing the European Community and the Treaty on European Union, the legal basis for each of the provisions or decisions which constitute the acquis".