The Conduct of Elections Rules, 1961
Section 81. Filling the last vacancies
(1) When at the end of any count the number of continuing candidates is reduced to the number of vacancies remaining unfilled, the continuing candidates shall be declared elected.
(2) When at the end of any count only one vacancy remains unfilled and the value of the papers of some one candidate exceeds the total value of the papers of all the other continuing candidates together with any surplus not transferred, that candidate shall be declared elected.
(3) When at the end of any count only one vacancy remains unfilled and there are only two continuing candidates and each of them has the same value of votes and no surplus remains capable of transfer, the returning officer shall decide by lot which of them shall be excluded; and after excluding him in the manner aforesaid, declare the other candidate to be elected.
By lot – means – randomly chosen between the available options – the use of lots as a means of deciding something (Merriam Webster) – the use of lots in making a selection or choice (esp in the phrase by lot) (Collins)
Lot – means – an object used as a counter in determining a question by chance (Merriam Webster) – any object, such as a straw or slip of paper, drawn from others at random to make a selection or choice (esp in the phrase draw or cast lots) (Collins)