By Luc Cohen NEW YORK (Reuters) – The first person ever charged under a new law U.S. law allowing prosecutors to target doping in international sporting competitions is arguing the law is unconstitutional, in a bid to persuade a judge to dismiss the charges against him. Eric Lira, who was arrested in January for distributing performance-enhancing drugs including human growth hormone to athletes at the Tokyo Olympics, argued in a late Tuesday court filing that the 2020 Rodchenkov Act improperly relies on rules drawn up by the United Nations and the World Anti-Doping Agency. “This unprecedented …