The case now will go back to U.S. District Judge Robin Cauthron in Oklahoma City to decide whether she will turn her 2008 preliminary injunction against the law into a permanent injunction.
One part of the law upheld by the appeals court requires businesses that contract with government agencies to verify the immigration status of job- seekers by using a federal database known as E-Verify.
The U.S. Chamber of Commerce in Washington took the lead on behalf of various business groups in opposing the three employment-related provisions of the law.
The chamber did not respond Monday to a request for comment.
Rep. Randy Terrill, primary author of HB 1804, said he’ll continue to fight for the law.
"When further legal arguments are made in this case, I will file another amicus brief on behalf of myself and all other legislators who support this law,” Terrill said.