181. (a) During the Ruler’s minority or his physical incapacity to discharge his duties, the heir presumptive to the throne, if he be 21 years of age or more shall be regent of full right. In default the regent shall be elected by the Legislature of the State, convened within a month by the Ministers.
(b) Unless a Regent is appointed under this Clause, the Speaker of the Legislature of the State concerned shall act as the Regent.