Oral arguments will begin today for one of the most important cases in internet law history. The case will be heard in a Washington, DC courtroom, as a group of net neutrality defenders squares off with the Federal Communications Commission in a legal battle to decide the rules of the web.

When the FCC, led by a Republican majority, moved in late 2017 to repeal Obama-era net neutrality rules, it kicked off a fight on several fronts. There’s been some pressure on congressional lawmakers to overrule the decision, and states have moved to implement their own versions of the rules.

But what may be the most likely shot at restoring net neutrality regulations will come from a petition against the FCC filed by several supporters of the dismantled rules. The case, Mozilla Corporation v. FCC, will be heard by the US Court of Appeals for the District of Columbia, and the court will decide whether the FCC, led by Chairman Ajit Pai, was within its rights to end the protections.

More at The Verge.