Both developments came Thursday and are the latest in a flurry of legal activity over whether the state should allow gay couples to marry.
Last month, Judge Mary Jacobson ruled that the state must recognize same-sex nuptials starting Oct. 21, saying the state is blocking some of its residents from federal legal protection for their relationships.
The administration of Christie, a Republican and possible 2016 presidential candidate, is asking the state Supreme Court to overturn Jacobson's decision.
In the meantime, the state also asked Jacobson to delay the mandate until the main case is sorted out by higher courts.
On Thursday, Jacobson refused.
A delay "would simply allow the state to continue to violate the equal protection rights of New Jersey same-sex couples, which can hardly be considered a public interest," she said in her opinion.
Gay rights supporters lauded the ruling, which moves New Jersey a step closer to having same-sex marriages occur this month.
The state immediately appealed her ruling.
It has until noon Friday to lay out its position. Garden State Equality, which along with a half-dozen same-sex couples sued for the state to legalize gay marriage, has until Tuesday to file a response.
The state had told Jacobson that New Jersey would be harmed by moving ahead with gay marriage now -- in part because having same-sex couples legally wed would make it harder for a court not to allow gay marriage.
Christie supports civil unions, which the state has had since 2007, but says marriage laws should be changed only by a popular vote.
"I don't think that should be decided by 121 politicians in Trenton or seven judges on the Supreme Court," he said at a debate this week. "It should be decided by the 8.8 million people of New Jersey."
Copyright 2013 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.