Lucid interval is known as the temporary period of sanity experienced by an individual who is currently suffering from an unsound mind which can make them unable to perform legal acts. Unlike psychological incapacity, lucid interval is something temporary whereas the former is something permanent. In the Philippine laws, the Doctrine of Lucid Interval is a critical legal principle which balances the exemption of the insane from legal liabilities and from holding them accountable during a period of sound mentality – upholding principles of criminal responsibility and contractual validity. It is important in legal matters as it determines the validity of acts during such period. Generally, it is believed that every person is sane, but for them to be exempt from legal consequences, they must be able to prove their insanity during the commission of the act.
Legal Basis
Article 1327 of the Civil Code governs the topic on persons incapacitated to give consent. Under this provision, it provides that people who are incapable to give their consent are: unemancipated minors, insane or demented individuals, and or deaf-mutes who cannot write. Furthermore, article 1328 of the Civil Code governs the matters related to contracts. In this provision, it provides that all contracts entered into during a lucid interval are valid and binding.
Similarly, Rules 92 and 93 of the Rules of Court governs the guardianship for incompetent persons. These mandates that guardianship for incompetent persons, which includes those suffering from unsound mind, must be filed at the court and undergo necessary processes. Those who can file a petition are relatives or friends, the ward themselves, and the director of health1.
On the other hand, the Revised Penal Code under Article 12 governs the circumstances that exempts an insane person from criminal liability. Persons who are mentally incapacitated are exempt from criminal liability, given that at the time of the crime, they are proven not to be in their lucid state since they lack the necessary mental capacity or voluntariness to commit crimes. However, if the crime was done during their lucid interval, they are not exempt and may face legal consequences.
Lucid interval is also important for family and succession matters. In marriage, consent must be given by the couple during their lucid interval to make the union valid. Moreover, in article 799 of the Civil Code, it governs the matter on wills. It states that insane persons are still capable of making a will given that it must be done during their lucid state2.
The case of Ruiz vs People shows how insanity is a necessary concern in legal matters. Mare Claire Ruiz was charged for killing Paulita Bonifacio, and the former has admitted to the crime, but asserted her defense of insanity. She has presented a psychiatric expert who diagnosed her with schizophrenia and psychotic disorder. The Supreme Court ruled that at the time of the killing, she was insane or of unsound mind. Therefore, she is legally exempt from criminal charges under Article 12 of the Revised Penal Code. The ruling was made with the reasoning that Ruiz was incapable of understanding the gravity and consequences of the crime during its commission. Afterwhich, it was ordered that she is sent to a mental institution3.
- Rules of Court, Rule 92, Secs. 1–3; Rule 93, Secs. 1–2 (Phil.) ↩︎
- Rules of Court, Rule 92, Secs. 1–3; Rule 93, Secs. 1–2 (Phil.) ↩︎
- Mare Claire Ruiz y Serrano v. People of the Philippines, G.R. No. 244692, Supreme Court of the Philippines (Oct. 9, 2024) ↩︎
