Officers are liable till they're 50 years old but once the 13 year cycle is complete, you're transferred to a holding list.
I was out of the country from 40 onwards anyway but I will always remember what the honorable Mr Lee Kuan Yew did for me and will be eternally grateful for the opportunities that he created for me and for the education that he provided me.
Even on my deathbed, if he needs my help, I will get up from my grave and rise to the occasion.