there is no cap for medical treatment, certain investment, technology transfer , salary and wage and so on . but the general assumption is you cannot take $$$ out of country and the sole purpose of this rule is to stop money laundering .

if you convince and declare that the intention of your transfer is not money laundering you can take certain amount at one time . but definitely not 1 crore or 2 crore at a time. this rule doesn't apply to American citizen

why rule doesn't apply to American citizen ?

if you are us citizen and later if they found out that you are involved in money laundering, they cannot call you back and arrest you as you are us citizen , but if ur are green card, they can always write to cancel your gc and put you in trial as per nepal gov rules