When is the last time you saw a wedding dress?

On Friday, the US Supreme Court will hear a challenge to a ban on using plastic headliners, a decision that will also decide whether it’s legal for a designer to make a dress in a material that’s already prohibited under federal law.

In a decision released Monday, the court said that the headliner material on headliners in the US is already banned by federal law, which bans “plastic headliner materials,” such as nylon or rayon, that do not comply with the materials safety standard for consumer products.

While the court has no specific decision yet on whether it will rule on the issue of plastic headliner fabrics, the ruling will likely be one of the most important in the court’s history.

“The ban on headliner fabric was not a blanket prohibition that applies to all headliners,” Chief Justice John Roberts wrote for the court in a statement Monday.

“It is clear that the ban on plastic headlining materials does not cover all headlining fabrics.”

The ruling comes at a time when the court is grappling with a number of controversial cases, including a case challenging the constitutionality of President Donald Trump’s travel ban, as well as the controversial death penalty case of a man who was sentenced to death for stabbing a man to death in Florida.

In addition to the ban, the Trump administration has argued that it should be able to use federal funds to create “alternative materials” to prevent “widespread harm” from the materials.

As of Monday afternoon, the Supreme Court had issued a temporary restraining order blocking the ban in the case, which was brought by the American Civil Liberties Union, which said it is not allowed to block the ban because it is constitutional.

In its brief filed Monday, American Civil Liberations said that while the ban is not illegal, the government has not shown that it will prevent widespread harm from the material.

“There is no reason to believe that alternative materials would not have the same effect,” the brief said.

“The ban would make the products, in this case headliners and other headlining fabric, more likely to be contaminated with plastic fibers.”

While the Supreme [Court] may not have to decide whether a plastic head lining ban is constitutional, the justices may have to grapple with the question of whether it is legal under the US Constitution, which prohibits “importation into the United States of any article of manufacture which is not specifically prohibited by this title,” the document states.

If the Supreme court decides the ban should be struck down, it could have implications for other areas of the law, including the legality of the federal ban on military equipment, which could lead to an even bigger legal headache for the Trump White House.

The Trump administration argued in its brief that the Supreme Courts ruling would not affect the constitution, noting that it had already decided the case before.

The justices are expected to issue a decision by the end of the week.