Authorizes certain inmates serving an indeterminate sentence to receive good time allowances of up to 1/3 of their minimum sentences

Authorizes inmates serving indeterminate sentences of imprisonment for offenses involving controlled substances and marihuana to receive good time allowances against the minimum terms of their sentences not to exceed one-third of the minimum term imposed; provides that drug offenders can receive good behavior allowances for progress in assigned treatment programs and willing performance of duties.