What is the impact of the 2000 Substance Abuse and Crime Prevention Act on sentencing of drug offenders?

^12. This proposition was an initiative measure approved by the voters years before the 2012 Proposition 36. "The Substance Abuse and Crime Prevention Act of 2000 . . . , which the voters of California enacted through Proposition 36, requires courts to order probation and community-based drug treatment rather than incarceration for certain criminal offenders who commit ' "nonviolent drug possession offense[s]" ' . . . . (Pen.Code, 1210, subd. (a).)" (People v. Guzman (2005) 35 Cal.4th 577, 583, fn. omitted.)