(1) A Senator or a member of the House may resign his or her seat by writing under his or her hand addressed to the President or the Speaker, as the case may be, and the resignation shall take effect, and the seat shall accordingly become vacant, when the writing is received, as the case may be, by—
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(a) the President or Speaker;
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(b) if the office of President or Speaker is vacant or the President or Speaker is for any reason unable to perform the functions of his or her office and no other person is performing them, the Deputy President or Deputy Speaker; or
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© if the office of Deputy President or Deputy Speaker is vacant or the Deputy President or Deputy Speaker is for any reason unable to perform the functions of his or her office and no other person is performing them, the Clerk of the Senate or Clerk of the House.