Specifies the sex offender reporting requirements for persons who are sex offenders or required to register in other jurisdictions. Adds "high risk missing person" to the definition of "missing child". Specifies that the silver alert program applies to missing children. Removes provisions concerning possession of child sex abuse material (CSAM) from the statute containing the offense of child exploitation, and makes a new section for CSAM offenses. Creates a new crime for distribution of CSAM, and generally conforms the sentencing enhancements for possession of CSAM, distribution of CSAM, and child exploitation. Specifies that certain restrictions on CSAM in discovery also apply in civil proceedings (under current law, they only apply in criminal proceedings). Provides a defense in specified circumstances. Removes certain duplicative provisions and makes conforming amendments and technical corrections.