It would not go ahead if only one candidate was nominated.
Nominations for the position open on August 3 and close on August 31.
If only one candidate was nominated that person would automatically be elected and take up their role on September 5.
If more than one person was nominated voting papers would start to be delivered on October 5 with the final day for voting October 27.
However, councillors decided not to go ahead with a move to decide on "the method and listing of candidates for a byelection and the electoral system to be used for 2019 and 2022 local elections".
This was due to the fact the voting method would also be used for district's next two elections with some councillors, including Karen Hunt and Dave Donaldson, saying Rotorua should change to a single transferable vote (STV) election system instead of the current first past the post (FPP) system.
STV allows voters to rank candidates in order of preference.
They will also need to decide how names would appear on voting papers - either alphabetical, randomly on each voting document or a pseudo-random option for candidate names on voting documents.
Mayor Steve Chadwick said those sorts of questions should go to the Rotorua community as a whole to decide on.
Councillors agreed to park the issue until a full report had been prepared for the next meeting of the council's strategy, policy and finance committee next month.