Parole — conditional early release, Article 79 of the Criminal Code. The remainder of the sentence is not served, subject to conditions and supervision. Breach of the conditions can send the person back.
Commutation — replacement of the unserved part with a milder punishment, Article 80. The person still has a sentence, but a less severe one: forced labour or corrective labour rather than imprisonment. It becomes available earlier than parole for the same offence, and it is often the realistic first step. In many of our cases the sequence is commutation first, then release.