U.S. appeals court hears same-sex marriage case (CBS/AP) NEW YORK - A Justice Department lawyer was forced by a federal appeals panel in New York to explain the government's decision to stop defending the Defense of Marriage Act. Acting Assistant Attorney General Stuart Delery was put in an awkward position Thursday by two of three judges hearing arguments for the 2nd U.S. Circuit Court of Appeals. The court will not rule for months but it made note of the government's changed position on the 1996 law. Delery explained that President Barack Obama and Attorney General Eric Holder made the change early last year after the administration reviewed the law's legal reasoning. The law prohibits the government from recognizing same-sex marriages when federal benefits are at stake. It has already been struck down by several judges and a federal appeals court in Boston. It is expected to end up before the Supreme Court next year. Justice Ginsburg expects same-sex marriage case in 2013 Court: Defense of Marriage Act unconstitutional for denying same-sex married couples federal benefits Gay rights in spotlight at Democratic convention The law also had already been struck down by five trial-level judges, including U.S. District Judge Barbara Jones in Manhattan. She ruled that the law intrudes upon the states' regulation of domestic relations. Her June decision came after Edith Windsor sued the government in November 2010 because she was told to pay $363,053 in federal estate tax after her partner of 44 years, Thea Spyer, died in 2009. They had married in Canada in 2007. Windsor's lawyers said in court papers that the law does not benefit anyone because it defines marriage "to exclude married same-sex couples from the rights, privileges and obligations the federal government affords to all other married couples." The law, which denies federal recognition of same-sex marriages and affirms the right of states to refuse to recognize such marriages, was passed by Congress and signed by President Bill Clinton in 1996 after it appeared in 1993 that Hawaii might legalize it. Since then, many states have banned gay marriage but several have approved it, including Massachusetts and New York. In written arguments, former attorneys general Edwin Meese III and John Ashcroft say it is unprecedented that the government would not defend a law that does not involve concerns over the separation of powers. "Historically, the president's constitutional obligation to 'take care that the laws be faithfully executed' has been understood to include the vigorous defense of acts of Congress when they are challenged in court," they said. "It is no small step for a federal court to conclude that a coordinate branch of the federal government has acted irrationally," warned the Bipartisan Legal Advisory Group of the House of Representatives, which is defending the law. The Justice Department said the law was motivated largely by disapproval of gays and lesbians and there was no governmental interest to justify the law's "differential treatment of same-sex couples who are legally married under the laws of their states."