178. (a) In the event of the absence of the President or Governor or Rajpramukh or Administrator or of his death, resignation, removal from office, or incapacity or failure to exercise and perform the powers and functions of his office or at any time at which the office of the President, the Governor, the Rajpramukh or the Administrator may become vacant, his functions shall be discharged by the Speaker of the Legislature of the Federation or the Unit or the Sub-Unit, as the case may be, pending the resumption of duties or the election of a new President or Governor or Rajpramukh or Administrator.
(b) On such occasions and during such periods the Speaker of the Legislature shall not attend sessions of the Legislature and the Deputy Speaker concerned shall discharge the duties of the Speaker of the Legislature.
(c) On such occasions and during such periods the Speaker will have all the powers and immunities of the Head of the Federation or the Unit or the Sub-Unit concerned, as the case may be.