Seems like only a few months ago that the Supreme Court narrowly upheld President Obama’s health care reform law. That decision, combined with the President’s reelection and Democratic gains in both the House and Senate, appeared to spell the end of the fighting over whether the law would go into effect. Although there are still plenty of disputes over how the law will be implemented, what the final regulations will say, and so on, the core question of the law’s validity seemed to be settled.

Until last week, when the Court once again entered the Obamacare fray. The Court had previously dismissed a lawsuit brought by Liberty University challenging the health care law, based on its holding last summer that the individual mandate to purchase insurance was constitutional. Liberty University asked the court to reconsider, and last week it did. The Court vacated its decision not to hear the case, granted Liberty’s petition for rehearing, and sent the case back to the Fourth Circuit Court of Appeals. Once that Court issues a decision, the case could once more find its way back to the Supreme Court, as early as next year.

There are two issues in the Liberty case. The school is challenging the law’s employer mandate: the requirement that employers with more than 50 employees either provide health insurance for employees that meets certain financial and coverage requirements or pay a fine. The school is also challenging the law’s requirement that health care plans (whether purchased by an employer or an individual) must include contraceptive coverage, without a copay.

For more information on what the health care law requires, see Health Care Reform: What Employers and Employees Need to Know.