You'll have your chance during BMT.
Otherwise, I believe it is an offence for anyone to take combat
rations out of camp and to sell it.
Yeah its an offense to sell MREs. I've not seen the Singapore
MRE pack but I've seen the US MRE pack. There is a warning printed
on the pack that sale of the MRE is prohibited. Got a pic on my
desktop.
By the way the US MRE is very salty. That is for the Omelet menu
that I ate. Singapore I tried the "lo mai kai" at Army open house.
Not bad..