Oklahoma's Sex Offender Registration Act was amended on June 7, 2006 and barred sex offenders from living within 2,000 feet of any public or private school, playground, park or licensed child-care center. In July and August of 2006, hundreds of sex offenders received letters from the Oklahoma Department of Corrections noting they were in violation of a "zone of safety" provision in state law. Those who received the letters were told that within 30 days "they must move or face arrest and prosecution of a felony." A group of Tulsa County sex offenders has filed a federal lawsuit challenging the new state law about where they can dwell as the new act only leaves 8% of the city available for registered sex offenders to live. The lawsuit seeks class action status and claims hundreds of people on Oklahoma's sex-offender registry are being forced to move from their homes, leave their jobs and stop attending their churches as a result of recently enacted state laws.