Rules on Computation of Penalties:
1. When the offender is in prison – the duration of the temporary
   penalties (Permanent Absolute Disqualification, Temporary
   Absolute Disqualification, detention, suspension) is from
   the day on which the judgment of conviction becomes final.
2. When the offender is not in prison – the duration of the
   penalty of deprivation of liberty is from the day that the
   offender is placed at the disposal of judicial authorities
   for the enforcement of the penalty
3. The duration of the other penalties – the duration is from
   the day on w/c the offender commences to serve his sentence


Reason for rule (a) – Under Art 24, the arrest and temporary
detention of the accused is not considered a penalty.

If in custody, the accused appealed, the service of the
sentence should commence from the  date of the  promulgation
of the decision of the appellate court, not the  trial court.

Service in prison begins only on the day the judgment of
conviction becomes final.

In cases of temporary penalties, and if the offender is under
detention (as when undergoing preventive imprisonment), rule
(a) applies.

If he is not under detention (released on bail), rule
(c) applies.

If offender is under preventive imprisonment, rule (c)
applies, not rule (a).

The offender is entitled to a deduction of the full time or
4/5 of the time of his detention.