The U.S. Court of Appeals for the Second Circuit has turned aside the latest in a series of challenges to the federal sex-offender registration law.

For the third time in a year, the circuit has upheld the constitutionality of the Sex Offender Registration and Notification Act (SORNA), 42 U.S.C.§16901, this time rejecting a claim by a man whose predicate sex-offense convictions occurred before the law was enacted in 2006.