Where a 2008 amendment to Illinois residency requirements for child sex offenders was not unconstitutional as applied to plaintiffs, as it prohibited only prospective conduct, was not an unconstitutional taking, applied to all child sex offenders equally and had a rational basis.The 7th U.S. Circuit Court of Appeals affirmed a decision by U.S. District Judge Amy J. St. Eve.Illinois first adopted residency restrictions for child sex offenders in 2000. As originally enacted, the law prohibited child sex offenders from …