Press Release: Judgment of the Court of Justice in Case C-277/99. Doris Kaske v Landesgeschäftsstelle des Arbeitsmarktservice Wien. Entitlement to benefits acquired by a migrant worker who is a national of a country that is party to a bilateral agreement on social security matters must be preserved, even if the worker exercised his or her right to free movement before the entry into force of a Community regulation, and before the Treaty became applicable, in his or her country of origin