The Supreme Court agreed Friday to wade into a fight over Congress’ ability to delegate power to federal agencies — opening the next chapter in a decadeslong effort by conservatives and business interests to reduce the power of the federal government.

The U.S. Supreme Court agreed on Friday to decide the legality of a congressionally authorized fund operated by the Federal Communications Commission to expand access to telecommunications services in a challenge accusing Congress of unlawfully delegating its authority to an independent federal agency.

The Supreme Court announced Friday it will hear a case that could deliver another blow to federal agencies’ powers. The justices agreed to take up the government’s appeal of a decision invalidating the Universal Service Fund (USF),

The cases explore whether Congress violated the Constitution when it allowed the Federal Communications Commission to gather fees to help pay for critical telecommunications services in communities that might not otherwise have it.

The Supreme Court could further weaken the power of federal agencies by agreeing to hear a dispute over a Federal Communications Commission program that requires companies to subsidize telecommunications services in under-served areas.