Which act amends provisions related to the PNP promotion system?

The correct response is rooted in the specific legislative history and context of the Philippine National Police (PNP) promotion system. Republic Act 9708 amends existing laws that govern the structure and operational procedures for promotions within the PNP. This act specifically addresses various aspects of the promotion process, including criteria, eligibility, and procedural reforms aimed at enhancing fairness and transparency.

By establishing clearer guidelines and processes, R.A 9708 directly influences how promotions are conducted, which is crucial for maintaining morale, professionalism, and public trust within the police force. This legislative framework is essential for ensuring that the promotion system supports the organizational goals of the PNP while also adhering to principles of meritocracy and accountability, key elements in law enforcement administration.

In contrast, other legislative acts mentioned do not pertain to the PNP promotion system and typically address different areas of law or administrative procedures unrelated to police promotions.