Monday, December 6, at 10 a.m., the 9th Circuit U.S. Court of Appeals will hear two hours of arguments in the appeal of the decision that found California’s same-sex marriage ban in violation of the U.S. Constitution.

A three-judge panel sitting in San Francisco will hear the arguments on three issues. The main issue, which Yes on 8 supporters have appealed, is whether U.S. District Court Judge Vaughn ruled correctly when he said Proposition 8 violates the U.S. Constitution’s guarantees to equal protection of the law and due process. The court will also hear arguments on two issues involving legal standing to bring the appeal—one involving the right of the Yes on 8 coalition, the other involving the right of Imperial County, California. The County Board of Supervisors of Imperial County has asked to serve as an intervenor in the appeal, arguing that, because it issues marriage licenses, it is impacted by the district court decision.