Cape Verde Legislative Decree 4/2003 of 18 November 2003 - PENAL CODE
VOLUME I - GENERAL PROVISIONS
TITLE I - GUARANTEES AND APPLICATION OF PENAL LAW
Article 1
(Principle of legality)
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3. Penalties and security measures may be determined in accordance with the law in force at the time a deed is committed or the defining criteria justifying such penalties or security measures have been fulfilled.
Non-retroactivity
Nulla poena sine lege
EDIT.