Because Texas did not create its own state-based marketplace, known as a health insurance exchange, under the Affordable Care Act, it must use a federally facilitated one instead. By federal law, the state must enforce provisions and regulations related to the insurance exchange and market reforms unless it notifies the federal government that it cannot or will not. If a state does not enforce those reforms, the federal Centers for Medicare and Medicaid Services will step in to do it.
Texas, Arizona, Alabama, Missouri, Oklahoma and Wyoming have all notified the federal government that they will not be policing the health law.