That waiver power sits at the center of the Big Bend fight. The Supreme Court's 8–1 order on Nov. 9, 2026, turned mainly on a narrower question: what the waiver law allows courts to hear at all. The answer, for now, is almost nothing.

What does the waiver law actually say?

It says the Secretary can "waive all legal requirements" he finds necessary for "expeditious construction" of border barriers and roads. That comes from Section 102 of the Illegal Immigration Reform and Immigrant Responsibility Act (IIRIRA), as quoted in the Supreme Court's order. The same section tells the Secretary to build barriers "to deter illegal crossings in areas of high illegal entry."

"Legal requirements" covers a lot. The Congressional Research Service says the term means any local, state or federal statute, regulation or administrative order, and a waiver takes effect once it's published in the Federal Register.

The law also restricts lawsuits. Courts can hear only claims "alleging a violation of the Constitution" and "shall not have jurisdiction" over anything else, according to the order.

Was the waiver always this broad?

No. The 1996 version was much narrower. As first passed, Section 102(c) let the Attorney General waive just two laws, the Endangered Species Act and the National Environmental Policy Act (NEPA), and only to the extent needed to build quickly.

The REAL ID Act of 2005 changed that. It let the Homeland Security Secretary waive all legal requirements "in his sole discretion", and it added the limits on court review. So the version at work in Big Bend is mostly a 2005 creation attached to a 1996 law.

How often has it been used?

Administrations of both parties have used it. Georgetown's count, eight waivers since 2005, is far behind now. Some milestones:

The Big Bend waivers are spread across several Federal Register notices and cover a range of environmental and conservation laws.

Why did the case skip the appeals court?

Because the waiver law requires it. Under IIRIRA §102(c)(2)(C), the Fifth Circuit Court of Appeals has no jurisdiction over these cases. That's why the Solicitor General went directly to the Supreme Court and asked it to reverse the lower court outright or put its order on hold. It explains how the case reached the justices barely a month after the injunction.

Why did the challengers lose this round?

The Court said their argument wasn't really constitutional, so the lower court had no power to hear it. The plaintiffs were a river guide, an environmental nonprofit and a group preserving a historic church in Ruidosa, Texas. They tried to fit through the constitutional-claims opening by arguing that the waivers violated the "major questions doctrine under the U.S. Constitution, Article I, Section 1." The major questions doctrine holds that agencies need clear permission from Congress before taking actions of vast economic or political significance.

On Oct. 2, 2026, the district court agreed with them. It called the doctrine "a constitutional clear statement rule grounded in separation of powers", found that the Secretary lacked clear authorization from Congress, and blocked the waivers along with all related construction.

The Supreme Court said the government is "exceedingly likely" to win on that point. Relying on an earlier case, Dalton v. Specter, it held that a claim that an official went beyond the power a statute gives him is a statutory claim, not a constitutional one. Calling it a constitutional claim doesn't change that. The ruling closes the path the challengers had found around the law's limit on lawsuits.

The Court also weighed the costs. It pointed to a Customs and Border Protection (CBP) declaration that the injunction was costing the government nearly half a million dollars a day that couldn't be recovered. It said that by passing the waiver law, Congress had shown "a clear preference for expeditious border construction" over the environmental and recreational harms the plaintiffs described. Justice Ketanji Brown Jackson would have denied the government's request.

Can anyone still challenge a waiver?

In theory, yes, if the claim is truly constitutional. In practice, those claims keep losing. The main one, the nondelegation argument that Congress handed the Secretary too much lawmaking power, failed in the 2017–18 San Diego case. A University of Miami law review author called it the most plausible remaining challenge and concluded the Secretary has "unfettered discretion." The Big Bend order doesn't address nondelegation.

There may be one other narrow opening. In the 2018 San Diego ruling, Judge Gonzalo Curiel said courts can review a non-constitutional claim when a "clear and mandatory" requirement in the statute has been violated. It's not clear whether that exception survives the new order.

Can courts check whether Big Bend is an "area of high illegal entry"?

Apparently not, though the Court didn't say so directly. The law covers barriers in areas of high illegal entry, and the Secretary found that Big Bend qualifies. The plaintiffs dispute that. Challenging the finding would mean arguing that the Secretary misapplied the statute, and under this order that looks like a statutory claim courts can't hear.

The two sides' numbers don't actually contradict each other. The Big Bend Sector covers more than 500 miles, over a quarter of the U.S.-Mexico border. The government cited more than 89,000 apprehensions there from 2021 to 2025. The plaintiffs said the sector ranks last among southern border sectors, with 0.3% to 2.2% of border-wide apprehensions each year. Both can be true, because the total is large in raw numbers but small next to other sectors.

Will the wall run through Big Bend National Park?

Not the wall itself, according to CBP. The agency says the 30-foot wall won't go through the national park. More than 200 miles of patrol roads and about 17 miles of vehicle barrier will, which is why some reports say the barriers "cut through" the park. The plaintiffs say the project would permanently change a landscape that includes the national park, Big Bend Ranch State Park and nearly 200 miles of the Rio Grande Wild and Scenic River corridor.

Is this the final word?

No. The unsigned order is temporary. It lasts until the Court decides whether to take the case, or until the court in El Paso resolves it. Meanwhile, Judge Kathleen Cardone's case there goes on. The order predicts how the justices would likely rule, but it isn't a final ruling. The Court still hasn't said whether any constitutional challenge to the waiver power could win.