As a law enforcement agency, the NPA is bound by the laws, rules and regulations under the criminal justice system of the people's democratic government, by the Comprehensive Agreement on Respect for Human Rights and International Humanitarian Law and by the international instruments of human rights and international humanitarian law. The organs for the arrest, investigation, prosecution and trial by jury of suspects are differentiated and well defined.
Bilang ahensyang tagapagpatupad ng batas, ang BHB ay saklaw ng mga batas, tuntunin at regulasyon ng sistema ng hustisyang pangkriminal ng demokratikong gubyernong bayan, ng Comprehensive Agreement on Respect for Human Rights and International Humanitarian Law, at ng internasyunal na mga instrumento ng karapatang-tao at internasyunal na makataong batas. Magkakaiba at may malilinaw na depinisyon ang mga organo sa pag-aresto, imbestigasyon, pag-uusig at paglilitis ng lupong tagahatol sa mga suspek.