"30 days from now, without some other relief, he's ordered to go," said Colleen Gable, an assistant district attorney in Erie County, New York, where Weinstein is imprisoned following his rape conviction in Manhattan.
Weinstein, in a dark, button-down shirt, was seated against a light blue cinder block wall at Wende Correctional Facility as he appeared remotely at an extradition proceeding.
A legal technicality over the way the Los Angeles County District Attorney's office filed paperwork against Weinstein threatened to delay extradition but prosecutors filed new paperwork and the judge signaled extradition would move forward absent a challenge by the defense.
"If I don't hear from anybody, California would make arrangements to have him transferred," said State Supreme Court Judge Kenneth Case.
In California, Weinstein was first charged with rape in January 2020, as his trial was beginning in Manhattan. More counts were added last April.
He now stands charged with four counts of rape, four counts of forcible oral copulation, two counts of sexual battery by restraint and one count of sexual penetration by use of force. The counts involve five women and stem from events in Los Angeles and Beverly Hills from 2004 to 2013.
The defense opposed the 30-day deadline, arguing the filing of fresh paperwork should give the defense more time to challenge Weinstein's departure from New York.
"This is a brand new day. Groundhog Day has started again," defense attorney Norman Effman said.
Effman said he would file a new challenge sometime in the next 30 days. Weinstein said nothing during the hearing. When it concluded he said "Thank you, your honor."
"We are eager to defend Harvey against these spurious charges, but not unless he is first allowed a fair and lawful extradition process that will account for his ongoing medical treatment in New York and the fact that COVID still prevents him from having an in-person trial in the Los Angeles courts for the foreseeable future," Weinstein defense attorney Mark Werksman, said in a statement.
Weinstein is serving a 23-year sentence following his February 2020 conviction for sexually assaulting a former production assistant and raping an aspiring actress.
ABC News' Chris Francescani and Ivan Pereira contributed to this report.