ORLANDO, Fla. — A panel of three appellate judges on Wednesday upheld a lower court order allowing the 2020 head count of every U.S. resident to continue through October. But the panel struck down a provision that had suspended a year-end deadline for turning in figures used to decide how many congressional seats each state gets.

The ruling by the three judges on the Ninth Circuit Court of Appeals in San Francisco was a split decision for the Trump administration and a coalition of civil rights groups and local governments that had challenged the administration’s 2020 census schedule.

The decision upheld part of U.S. District Judge Lucy Koh’s preliminary injunction last month, and rejected part of it.

Koh’s preliminary injunction suspended a Sept. 30 deadline for finishing the 2020 census and also a Dec. 31 deadline for submitting numbers used to determine how many congressional seats each state gets in a process known as apportionment. Because of those actions, the deadlines reverted back to a previous Census Bureau plan that had field operations ending Oct. 31 and the reporting of apportionment figures at the end of April.

The coalition of civil rights groups and local governments had argued that minorities and others in hard-to-count communities would be missed if the counting ended in September instead of October. But Trump administration attorneys had argued that the Census Bureau was obligated to meet the congressionally mandated requirement to turn in apportionment numbers by Dec. 31.

Neither the Commerce Department nor the Census Bureau responded immediately to an email inquiry. A Trump administration attorney suggested Monday during arguments before the appellate court panel that they would appeal to the U.S. Supreme Court.

Supporters of the longer head count schedule praised the decision.

“The courts keep speaking even if the Trump administration is not listening,” said Julie Menin, who heads New York City’s census outreach efforts. “The Trump administration has lost time and time again in their attempts to interfere with the 2020 Census, and we welcome the Ninth Circuit’s decision, which preserves a fair and accurate census timeline.”

In response to the pandemic, the Census Bureau in April proposed extending the deadline for finishing the count from the end of July to the end of October and pushing the apportionment deadline from Dec. 31 to next April. The proposal to extend the apportionment deadline passed the Democratic-controlled House, but the Republican-controlled Senate didn’t take up the request. Then, in late July or early August, bureau officials shortened the count schedule by a month so that it would finish at the end of September.

The Republicans’ inaction coincided with a memorandum President Donald Trump issued, which was later ruled unlawful by a panel of three district judges in New York, directing the Census Bureau to exclude from the apportionment count people in the country illegally. The Trump administration is appealing that case to the Supreme Court.

By sticking to the Dec. 31 deadline, the apportionment count would be under the control of the Trump administration no matter who wins the presidential election next month.

While allowing the head count to continue through October does leave less time to crunch the numbers before the Dec. 31 deadline, Trump administration officials and outside advisory groups had said that the Census Bureau would be unable to meet that deadline “under any conditions," the appellate judges said.

Any harm caused by shortening the time for data processing after the count was outweighed by the harm that would come from ending the count early, the judges said.

“Perhaps the Bureau will find that with an extraordinary effort or changes in processing capacity, it is able to meet its deadline," the judges said. “Or the Department of Commerce may seek and receive a deadline extension from Congress. Or perhaps the Bureau will miss the deadline, as statement after statement by everyone from agency officials to the President has stated it would, due to the extraordinary circumstances of the pandemic."

The census determines how many congressional seats and Electoral College votes each state gets and how $1.5 trillion in federal funding is distributed each year.

As of Tuesday, 99.7% of households nationwide had been counted, a figure that surpassed the completion rate in 2010, although South Carolina, Alabama, Mississippi and Louisiana hadn’t yet crossed the 99% threshold, according to the Census Bureau.