Coffs Harbour City Councillor Jan Strom has officially resigned.
After taking leave from council last year, Cr Strom has made the decision based on medical advice.
Jan Strom was one of nine councillors elected in 2016.
In recent times, in the absence of Cr Strom, if the votes tied, it would be decided by the Mayor with a casting vote.
This was the case with a number of major decisions by Coffs Harbour City Council.
With less than 18 months until the next Local Government Election on 12 September 2020, Coffs Harbour City Council has the option to avoid a by-election which would be quite costly.
Councillors will vote on Thursday night whether or not to hold a by-election.