Knowledge of internal and external customer service principles and practices. 2. Knowledge of law enforcement principles and practices. 3.The document outlines standard operating procedures for Philippine National Police (PNP) operations. It details 9 rules that all PNP personnel must follow. The document discusses law enforcement as the first pillar of the criminal justice system. This continuum generally has many levels, and officers are instructed to respond with a level of force appropriate to the situation at hand. Public safety and law enforcement agencies will converge efforts in patrolling, internal security, and law enforcement operations, both in land and at sea. The document outlines general principles and guidelines for planning police field operations according to the PNP Operational Procedures Manual. In the performance of their duty, law enforcement officials shall respect and protect human dignity and maintain and uphold the human rights of all persons. The Illinois Law Enforcement Training and Standards Board is the state agency mandated to promote and maintain a high level of professional standards.