128. (1) All executive action of the Government of a Conduct of Province shall be expressed to be taken in the name of business of the Governor.

(2) Orders and other instruments made and executed in the name of the Governor shall be authenticated in such manner as may be specified in rules to be made by the Governor, and the validity of an order or instrument which is so authenticated shall not be called in question

On the ground that it is not an order or instrument made or executed by the Governor.

(3) (a) The Governor shall make rules for the more convenient transaction of the business of the Provincial Government, and for the allocation among Ministers of the said business in so far as it is not business with respect to which the Governor is by or under this Constitution required to act in his discretion:

Provided that in the Provinces of Bihar, Central Provinces and Berar and Orissa, there shall be a Minister in charge of tribal welfare who may in addition,

(b) For the avoidance of doubt it is hereby declared that the allocation of business among Ministers may, where the Province contains distinct regions, be on a regional basis.