1987 Constitution of the Philippines
Section 5.
All members of the armed forces shall take an oath or affirmation to uphold and defend this Constitution.
The State shall strengthen the patriotic spirit and nationalist consciousness of the military, and respect for people's rights in the performance of their duty.
Professionalism in the armed forces and adequate remuneration and benefits of its members shall be a prime concern of the State. The armed forces shall be insulated from partisan politics. No member of the military shall engage, directly or indirectly, in any partisan political activity, except to vote.
No member of the armed forces in the active service shall, at any time, be appointed or designated in any capacity to a civilian position in the Government, including government-owned or controlled corporations or any of their subsidiaries.
Laws on retirement of military officers shall not allow extension of their service.
The officers and men of the regular force of the armed forces shall be recruited proportionately from all provinces and cities as far as practicable.
The tour of duty of the Chief of Staff of the armed forces shall not exceed three years. However, in times of war or other national emergency declared by the Congress, the President may extend such tour of duty.