"We request you to convene a Special Session to discuss this important issue," MPF secretary James K Sangma said in a letter to Assembly Speaker AT Mondal.
Meghalaya High Court recently directed the state government to frame uniform laws on the functioning of the traditional chiefs (headmen).
The decision to demand a special session of the Assembly was taken at a recent meeting of MPF consisting of United Democratic Party, National People's Party, Garo National Council and Khun Hynniewtrep National Awakening Movement.