When the culprit has to serve two or more penalties, he shall serve them simultaneously if the nature of the penalties will so permit; otherwise, said penalties shall be executed successively, following the order of their respective severity, which shall be determined in accordance with the following scale:
1. Death.
2. Reclusion perpetua.
3. Reclusion temporal.
4. Prision mayor.
5. Prision correctional.
6. Arresto mayor.
7. Arresto menor.
A person sentenced to destierro who is also sentenced to the penalty of prision or arresto shall be required to serve these latter penalties before serving the penalty of destierro.