AP Judge Mary C. Jacobson ruled that New Jersey must allow gay couples to marry starting Oct. 21. Photo:

AP Judge Mary C. Jacobson ruled that New Jersey must allow gay couples to marry starting Oct. 21. Photo:

TRENTON, N.J. — A single judge should not be able to force New Jersey to recognize gay marriage, Gov. Chris Christie’s administration said in a court filing Friday.

The argument is included in a brief the state submitted in support of its emergency appeal made a day earlier after a state judge refused to delay her order that New Jersey legalize same-sex marriage as of Oct. 21.

“It is in the public interest that such a profound change, if it is to occur, take place not because a single judge — no matter how diligent, thoughtful, and thorough — ordered it, but rather because the Supreme Court, the ultimate arbiter, has deemed it necessary,” the state Attorney General’s Office said in its brief.

“To overhaul such an ancient social institution prematurely, precipitously, or in a manner ultimately deemed unnecessary would injure not only the public interest, but the State that represents this interest,” the filing said.

Same-sex marriage has been a political and legal issue in New Jersey for more than a decade, but it’s probably never had the urgency it has now.

A group of couples plus the gay rights group Garden State Equality sued in July in an effort to get the state to recognize gay marriages in light of a U.S. Supreme Court ruling that cleared the path for the federal government to deliver marriage benefits to gay couples.

Judge Mary Jacobson ruled in their favor last month.

Now, the administration of Christie, a Republican and possible 2016 presidential candidate, is appealing both the overall ruling and Jacobson’s decision on Thursday not to delay the due date.

The state argues that it has a reasonable probability of winning the overall appeal of Jacobson’s ruling and that allowing same-sex marriages to move ahead in the meantime would be damaging to the state.

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As it has in other legal forums, the state says its law granting gay couples civil unions – but not marriages – should not be overtu rned because of federal action. Gay rights groups and Jacobson both disagreed, but the state believes it has a reasonable chance of prevailing with that argument in New Jersey’s top court.

The plaintiffs in the lawsuit have until Tuesday to file legal papers in response. A ruling is expected before the Oct. 21 date when same-sex marriage licenses would take effect.

Separately, gay marriage advocates are pushing lawmakers to override Christie’s veto last year of a bill that would legalize same-sex marriage. The deadline for an override is in January.

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