In the event of the death, resignation, or disability of the Sergeant at Arms and Doorkeeper of the Senate, the Deputy Sergeant at Arms and Doorkeeper shall act as Sergeant at Arms and Doorkeeper of the Senate in carrying out the duties and responsibilities of that office in all matters until such time as a new Sergeant at Arms and Doorkeeper of the Senate shall have been elected and qualified or such disability shall have been ended. For purposes of this section, the Sergeant at Arms and Doorkeeper of the Senate shall be considered as disabled only during such period of time as the Majority and Minority Leaders and the President Pro Tempore of the Senate certify jointly to the Senate that the Sergeant at Arms and Doorkeeper of the Senate is unable to perform his duties. In the event that the Sergeant at Arms and Doorkeeper of the Senate is absent, the Deputy Sergeant at Arms and Doorkeeper shall act during such absence as the Sergeant at Arms and Doorkeeper of the Senate in carrying out the duties and responsibilities of the office in all matters.