When is the critical time to renounce your SG Citizenship ??? A lot of people got booby-trapped by this law .
For those male, whose smart alec SG mom or dad registered him for Singapore BC, they are set for life.
For these male who have no intend of taking up Singapore citizenship as they are already a citizen of some other country, they can apply to renounce their Singapore citizenship only when they turn 21.
However, for these male who are overseas, regardless of what they are doing, once they turned 18, they are required to be back SG to serve NS.
Here lies the entrapment. Serve NS at 18 before you can renounce at 21.