Alyssa Mae F.
Guevarra Legal Research
Block 2 – Juris Doctor September 13, 2019
Ex Post Facto Law
There are limitations on the power of the lawmaking body to enact penal legislation. (Reyes,
2012). One of them is “no ex post facto law or bill of attainder shall be enacted. (Article 3, Sec 22,
1987 Constitution).
An ex post facto law is one which: (1) makes an action done before the passing of the law,
and which was innocent when done, criminal, and punishes such action. (2) aggravates the crime or
makes it greater than when it was committed. (3) changes the punishment and inflicts a greater
punishment than that which the law annexed to the crime when it was committed. (4) alters the legal
rules of evidence and receives less testimony than the law required at the time of the commission of
the offense in order to convict the accused. (5) assumes to regulate civil rights and remedies only
BUT, in effect, imposes a penalty or deprivation of a right, which, when done, was lawful. (6)
deprives a person accused of a crime of some lawful protection to which he has become entitled such
as the protection of a former conviction or acquittal, or a proclamation of amnesty. (In re: Kay
Villegas Kami, Inc., 35 SCRA 429, 431). Ex Post Facto Laws refer to criminal matters. They are
retroactive in application and are prejudicial to the accused.
Penal laws shall have a retroactive effect in so far as they favor the person guilty of a felony,
who is not a habitual criminal, although at the time of the publication of such laws a final sentence has
been pronounced and the convict is serving the same. (Article 22, Revised Penal Code). Ex Post Facto
Laws are not in favor of the accused as a result, lawmaking body is not allowed to enact them.