Interesting state certification "dodge" to deal with juve SORNA case from Montana

I am intrigued (and I think pleased) that the Supreme Court this morning in US v. Juvenile Male decided to deal with a complicated issue involving retroactive application of a federal sex offender notification provision for adjudicated juvenile delinquents by certifying a question to the Montana Supreme Court. The per curiam order in this case has the SCOTUS Justices asks this question of the Montana Justices:

Is respondent’s duty to remain registered as a sex offender under Montana law contingent upon the validity of the conditions of his now-expired federal juvenile-supervision order that required him to register asa sex offender, see Mont. Code Ann. §§46–23–502(6)(b), 41–5–1513(1)(c) (2005); State v. Villanueva, 328 Mont. 135, 138–140, 118 P. 3d 179, 181–182 (2005); see also §46–23–502(9)(b) (2009), or is the duty an independent requirement of Montana law that is unaffected by the validity or invalidity of the federaljuvenile-supervision conditions, see §46–23–502(10) (2009); 2007 Mont. Laws ch. 483, §31, p. 2185?

I am uncertain whether this "passive virtues" approach to dealing with the Solicitor General's cert request following Ninth Circuit's ruling in Juvenile Male is a clever or curious dodge of a complicated sex offender registration issue.  But I am certain that this approach shows the SCOTUS Justices' continued concern with at least some aspects of the scope and operation of federal SORNA provisions.