Kentucky's law that bans sex offenders from living within 1,000 feet of schools, day care facilities, parks, or playgrounds is being challenged in the state's Supreme Court.

The case is being brought on behalf of an Elsmere man and 11 other defendants who were cited by police in Kenton County.

Their residences were legal until the restrictions changed. The new law has no grandfather clause, and a Kenton County judge pointed out it also does not adequately define what a playground is.

There is no timetable for the justice's decision. The ruling is likely to be appealed to the U.S. Supreme Court. Similar cases are being heard in Ohio and Iowa.