Article 20 Revised Penal Code
Article 20 of the Revised Penal Code is about Accessories who are exempt from criminal liability. It is under Chapter Five (Alternative Circumstances) of Title Two (Persons Criminally Liable For Felonies) of the Code.
Accessories who are exempt from criminal liability
The penalties prescribed for accessories shall not be imposed upon those who are such with respect to their spouses, ascendants, descendants, legitimate, natural, and adopted brothers and sisters, or relatives by affinity within the same degrees, with the single exception of accessories falling within the provisions of paragraph 1 of the next preceding article.
See also: Article 19 Revised Penal Code