Nepal's permanent representative to the UN Gyan Chandra Acharya filed the letter on behalf of Nepal government Friday. A UNSC meeting next week will discuss on the letter.
According to the current mandate, UNMIN's term is ending on January 23.
Although, UNMIN's term was extended in six-month slots in the past, the government decided to extend the term only by four months this time. The government has also said, this would be the last time, it is seeking UNMIN's term extension.
UNMIN has been involved in Nepal's peace process since January 23, 2007.