PORTLAND, Ore. (AP) — An Oregon judge is set to decide whether a gun control law approved by voters in November violates the state’s constitution in a trial scheduled to start Monday.

The law, one of the toughest in the nation, was among the first gun restrictions to be passed after a major U.S. Supreme Court ruling last year changed the guidance judges are expected to follow when considering Second Amendment cases.

Measure 114 has been tied up in federal and state court since it was narrowly passed by voters in November 2022, casting confusion over its fate.

The law requires people to complete a gun safety training course and undergo a criminal background check in order to obtain a permit to buy a firearm. The measure also bans high-capacity magazines holding more than 10 rounds.

Circuit Court Judge Robert S. Raschio will preside over the trial this week in Harney County, a vast rural area in southeastern Oregon. Raschio temporarily blocked the law from taking effect in December after gun owners filed a lawsuit arguing it infringed upon the right to bear arms under the Oregon Constitution.

The Oregon measure was passed after a Supreme Court ruling in June 2022 created new standards for judges weighing gun laws and fueled a national upheaval in the legal landscape for U.S. firearm law.

The ruling tossed aside a balancing test judges had long used to decide whether to uphold gun laws. It directed them to only consider whether a law is consistent with the country’s “historical tradition of firearm regulation,” rather than take into account public interests like promoting public safety.

Since then, there has been confusion about what laws can survive. Courts have overturned laws designed to keep weapons away from domestic abusers, felony defendants and marijuana users. The Supreme Court is expected to decide this fall whether some decisions have gone too far.

In a separate federal case over the Oregon measure, a judge in July ruled it was lawful under the U.S. Constitution. U.S. District Judge Karin J. Immergut appeared to take into account the Supreme Court’s new directive to consider the history of gun regulations.

Immergut found large-capacity magazines “are not commonly used for self-defense, and are therefore not protected by the Second Amendment.” Even if they were protected, she wrote, the law’s restrictions are consistent with the country’s “history and tradition of regulating uniquely dangerous features of weapons and firearms to protect public safety.”

She also found the permit-to-purchase provision to be constitutional, noting the Second Amendment “allows governments to ensure that only law-abiding, responsible citizens keep and bear arms.”

The plaintiffs in that federal case, which include the Oregon Firearms Federation, have appealed the ruling to the 9th U.S. Circuit Court of Appeals.

Ten states have permit-to-purchase laws similar to the new Oregon measure: Connecticut, Hawaii, Maryland, Massachusetts, Michigan, Minnesota, Nebraska, New Jersey, New York and Rhode Island, according to data compiled by the Giffords Center to Prevent Gun Violence.

Eleven states and Washington, D.C. limit large-capacity magazines holding more than 10 rounds: California, Connecticut, Hawaii, Maryland, Massachusetts, New Jersey, New York, Rhode Island, Washington, Illinois and Vermont, according to the Giffords center. The bans in Illinois and Vermont apply to long guns.