A gold color metal and enamel device 1 1/4 inches (3.18 cm) in height consisting of a gold horizontal band, the upper edge crenellated, bearing three vertical black stripes all within a circular green belt inscribed "JUSTITIA ET PRUDENTIA" in gold letters; overall a gold key erect, the bow interlaced with the belt to simulate a buckle.
The design represents the Battalion's mission of command and support of a military prison. The gold and black band simulates a stockade and stands for the prison. The circular belt, symbol of power, strength and security, refers to command and administration. The key is for logistical support. Green and gold, the Military Police Corps colors, indicate the organization's branch. The motto translates to "Justice and Foresight or Wisdom."
The distinctive unit insignia was approved on 26 February 1967. It was amended effective 16 September 2011, to update the description and symbolism.