In Greece, the provision is included in the Constitution:

Article 29

3. Manifestations of any nature whatsoever in favor of or against a political party by magistrates and by those serving in the armed forces and the security corps, are absolutely prohibited. In the exercise of their duties, manifestations of any nature whatsoever in favor or against a political party by public servants, employees of local government agencies, of other public law legal persons or of public enterprises or of enterprises of local government agencies or of enterprises whose management is directly or indirectly appointed by the State, by administrative act or by virtue of its capacity as shareholder, are absolutely prohibited.