Extracurricular activities, which are a tradition and strength of the educational system, should be maintained and further encouraged. The use of such data by the OECD is without prejudice to the status of the Golan Heights, East Jerusalem and Israeli settlements in the West Bank under the terms of international law. The Laws on Education, General Education, Vocational Education and Institutions of Tertiary Education were passed in 1991 and have been amended numerous times since.