Sentencing
Where a change in the sentencing law would not affect the guidelines calculation, a reduction of the term of imprisonment is not authorized by the statute, despite the fact that the lower point total might allow for more discretion at resentencing.
http://media.ca7.uscourts.gov/cgi-bin/rssExec.pl?Submit=Display&Path=Y2016/D02-03/C:15-2492:J:PerCuriam:aut:T:fnOp:N:1697080:S:0
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.