Article 98 Revised Penal Code
Article 98 of the Revised Penal Code is about Special time allowance for loyalty. It is under Chapter Two (Partial Extinction Of Criminal Liability) of Title Four (Extinction Of Criminal Liability) of the Code.
Special time allowance for loyalty
A deduction of one-fifth of the period of his sentence shall be granted to any prisoner who, having evaded the service of his sentence under the circumstances mentioned in Article 58 of this Code, gives himself up to the authorities within 48 hours following the issuance of a proclamation announcing the passing away of the calamity or catastrophe to in said article.
See also: Article 97 Revised Penal Code