U.S. v. Crowder, No. 10-30125 (8-30-11)(Ikuta with Tashima and Bea).
The 9th holds that the government need not prove that a defendant knew that SORNA itself imposed a sex offender registration requirement. The government still must prove that the defendant knew of a registration requirement and knowingly failed to register, but not that he specifically knew of SORNA's "as required by" language. The 9th joins all the other circuits in this interpretation.