Starting in 2014, all health insurance not provided by employers in the United States will be sold by private insurance companies through an approved health insurance marketplace in each state. These marketplaces, also known as exchanges, must offer standardized policies that conform to the federal requirements of the Affordable Care Act, as well as additional requirements that may be determined in each state. Some states have chosen to set up their own marketplace. Other states are relying, by default, on the federal government to establish the marketplace in their state. And some states have chosen to rely primarily on federal exchange guidelines, but are choosing to administer some functions of the marketplace in their state in a hybrid approach known as a state partnership exchange.