The U.S. Supreme Court agreed on Friday to decide the legality of a key component of the Affordable Care Act that effectively gives a task force established under the landmark healthcare law known as Obamacare the ability to require that insurers cover preventive medical care services at no cost to patients.

Lower courts ruled that a task force that determines which treatments must be covered at no cost had not been validly appointed.

At issue is a provision requiring health-care plans to cover no-cost preventive care, including cancer screenings, immunizations and contraception. A Christian-owned business has challenged it.