Article 116 Revised Penal Code
Article 116 of the Revised Penal Code is about Misprision of treason. It is under Chapter One (Crimes Against National Security) of Title One (Crimes Against National Security And The Law Of Nations) of the Code.
Misprision of treason
Every person owing allegiance to (the United States) the Government of the Philippine Islands, without being a foreigner, and having knowledge of any conspiracy against them, conceals or does not disclose and make known the same, as soon as possible to the governor or fiscal of the province, or the mayor or fiscal of the city in which he resides, as the case may be, shall be punished as an accessory to the crime of treason.
See also: Article 115 Revised Penal Code