The new retro active law for nonviolent offenders is a federal statute that is related to a change in sentence calculations for certain drug offenses. If this is a federal sentencing question, inmates that are eligible can apply with their case manager. They will know if your inmate's sentence is provisional for a reduction.
The 50% and 35% you mentioned is not something we are familiar with.
https://www.inmateaid.com/ask-the-inmate/hi-my-husband-is-a-nonviolent-offender-that-hasn-t-been-in-any-trouble-while#answer
Accepted Answer Date Created: July 12,2016