BOISE, Idaho -

More than 100 sex offenders have filed a lawsuit challenging Idaho's sex offender registry laws, arguing that the rules governing registration and community notification are unconstitutional.

The Idaho Statesman reports that Twin Falls attorney Greg Fuller filed the 73-page lawsuit Thursday in Boise federal court on behalf of the 104 unnamed offenders. Nearly 40 defendants are named, including Attorney General Lawrence Wasden, Idaho Department of Correction Director Kevin Kempf and 21 sheriffs in counties where some of the plaintiffs reside.

Wasden declined to comment on the lawsuit.

The plaintiffs, who were primarily convicted in the 1980s and 1990s, argue that amendments to Idaho's sex offender registry laws have resulted in retroactive punishment, which is unconstitutional.