This rule means that such sex offenders must register as a sex offender in compliance with SORNA, even though the offense at issue was committed before SORNA. The preamble to this interim rule explains that SORNA establishes national standards for sex offender registration and notification and that SORNA's requirements are of two sorts. First, SORNA directly imposes registration obligations on sex offenders as a matter of Federal law and provides for Federal enforcement of these obligations under circumstances supporting Federal jurisdiction. Second, SORNA establishes minimum national standards for non-Federal jurisdictions to incorporate in their sex offender registration and notification programs. The preamble further states that rule-making was immediately necessary to foreclose any dispute as to whether SORNA is applicable when the conviction for the predicate sex offense occurred before SORNA was enacted.