New Jersey gay marriage ban overturned by judge 27 September 2013 Last updated at 23:32 A New Jersey court has lifted a ban on same-sex marriage but state Governor Chris Christie has said he intends to appeal against the decision. Superior Court Judge Mary Jacobson handed down the decision on Friday, finding the state's civil union system deprived those couples of certain federal benefits. The ruling takes effect on 21 October. Thirteen US states, including much of the Northeast region, currently allow same-sex marriage. The ruling follows a July US Supreme Court decision striking down key parts of a law that prohibited the federal government from granting benefits to same-sex partners. That same month, a group of same-sex couples and gay rights groups sued the state of New Jersey. They said the separate classification of "civil unions" did not entitle them to the same benefits as married persons. Judge Jacobson ruled in their favour, finding the separate labels excluded gay couples from certain benefits, such a filing a joint federal tax return. "Every day that the state does not allow same-sex couples to marry, plaintiffs are being harmed," she wrote in her opinion. The order will not take effect until 21 October, allowing the state time to challenge the ruling. Following the decision, a spokesman for New Jersey Gov Chris Christie told the media his office intends to lodge an appeal against the ruling with the state Supreme Court.