Starting in 2019, the Affordable Care Act’s individual mandate penalty will be eliminated, effectively ending the law’s requirement that most people have health insurance. Without a penalty, some people—particularly those who are younger or healthier—may drop coverage. The elimination of the mandate penalty has sparked a legal challenge regarding whether other features of the law, including rules that insurers cannot deny coverage or charge higher prices to those with pre-existing conditions, remain constitutional. For now, such provisions continue to be enforced.