Concept:
Narcotic drugs are strictly controlled under law due to abuse and addiction potential.
Step 1: Authorization requirement.
Possession, sale, storage, or use of narcotic drugs requires proper authorization.
Step 2: Illegal possession.
Possessing narcotic drugs without permission is a serious legal offence.
Step 3: Penalty.
Such offence can lead to imprisonment and monetary fine.
Step 4: Final answer.
Therefore, unauthorized possession leads to imprisonment and fine.
\[
\boxed{\text{Imprisonment and fine}}
\]