The federal appeals court will announce on Tuesday it's ruling on the constitutionality of Proposition 8, California's ban on gay marriage. The 9th U.S. Circuit Court of Appeals announced Monday morning that it plans to reveal the long-anticipated verdict by 1 p.m. ET. 

Proposition 8 was originally passed by voters in 2008. However in August 2010, U.S. District Chief Judge Vaughn R. Walker found that the proposition was unconstitutional and violated the federal equal protection rights of gay couples. 

Regardless of the outcome, both sides have expressed their plans to appeal if they lose tomorrow. If the case is eventually taken to the Supreme Court, the ruling could set an unprecedented national policy.