Schwarzenegger became a naturalized U.S. citizen on September 17, 1983. Shortly before he gained his citizenship, he asked the Austrian authorities for the right to keep his Austrian citizenship, as Austria does not usually allow dual citizenship. His request was granted, and he retained his Austrian citizenship. In 2005, Peter Pilz, a member of the Austrian Parliament from the Austrian Green Party, demanded that Parliament revoke Schwarzenegger's Austrian citizenship due to his decision not to prevent the executions of Donald Beardslee and Stanley Williams, causing damage of reputation to Austria, where the death penalty has been abolished since 1968. This demand was based on Article 33 of the Austrian Citizenship Act that states: "A citizen, who is in the public service of a foreign country, shall be deprived of his citizenship, if he heavily damages the reputation or the interests of the Austrian Republic." Pilz claimed that Schwarzenegger's actions in support of the death penalty (prohibited in Austria under Protocol 13 of the European Convention on Human Rights) had indeed done damage to Austria's reputation. Schwarzenegger explained his actions by referring to the fact that his only duty as Governor of California was to prevent an error in the judicial system.