Arizona legislators Thursday passed an education bill that requires students to pass the U.S. citizenship exam in order to graduate from high school, becoming the first in the nation to do so.

After the state’s House majority leader formally filed the bill on Monday, the state House and Senate fast-tracked the American Civics Act through the legislature in the first week of its legislative session.

Gov. Doug Ducey, a Republican, signed the bill into law Thursday evening. “Send it to my desk, and I’ll sign it immediately,” he had said in his state of the state address earlier this week.

Under the law, high-school students will need to answer 60 of 100 exam questions correctly to graduate from high school.

The bill is part of a larger campaign by the Civics Education Initiative, an affiliate of the Joe Foss Institute, a nonpartisan nonprofit based in Scottsdale, Ariz., to mandate the U.S. citizenship exam in schools around the country. The group said that 18 additional states are reviewing similar bills, noting that the North Dakota House of Representatives also passed a civics-education bill Thursday.