PES meaning in Governmental ?

National Service (NS) is a term that describes the national policy in Singapore that requires all male Singaporean citizens and second-generation permanent residents to serve a period of compulsory service in the uniformed services when they reach the age of majority, although women may also volunteer. It was first instituted in 1967 shortly after its independence to help build Singapore's military forces and guarantee its continued sovereignty, and has since been expanded to involve the police and civil defence force as well. Conscripts make up the majority of the manpower in the Singapore Armed Forces (SAF).

Upon enlistment, male Singaporean citizens and second-generation permanent residents serve for 2 years in active duty as full-time national servicemen (NSFs) in the Singapore Armed Forces (SAF), Singapore Police Force (SPF) or Singapore Civil Defence Force (SCDF), following which they transition to an operationally-ready reservist state as operationally-ready national servicemen (NSmen).

A two-month reduction in full-time National Service is offered for all pre-enlistees who are able to pass their (now-modified) three-station Individual Physical Proficiency Test (IPPT) consisting of push-ups, sit-ups and a 2.4 km run, with a minimum of 61 points (previously, the IPPT consisted of six single stations, which were the 2.4 km run, sit-ups, pull-ups, standing-broad jump, sit-and-reach stretch and shuttle-run).

The majority of NSFs serve in the Army as part of the SAF. The reasons for this include the relative manpower needs of the Army compared to the Navy and Air Force, the SPF, and SCDF. Moreover, as compared to the Army, the Air Force (RSAF) and Navy (RSN) are smaller armed services composed primarily of regular servicemen. As the manpower requirements of the RSAF and the RSN tend to be more specialized, the constant periodic turnover of NSFs is considered to be very disruptive.

The statutory age cap for reservist obligation is 40 for WOSEs (other ranks) and 50 for commissioned officers (lieutenants onwards in the SAF and the SCDF and police-inspectors and above in the SPF) and they are known as ex-NSmen.