The Hahira rule is plurality, not 50% plus 1.
According to email to Gretchen from John Hallman with the Georgia Secretary of State,
containing a forward from Jonathan Sumner, Hahira City Manager,
originally copied to all the Hahira candidates, Mayor and Council,
and many city employees on 25 October 2013:
Subject: No Runoff after General Election
Mayor, Councilmembers, Candidates,
In response to a question submitted to our City Attorney and myself
earlier today by Supervisor of Elections Deb Cox, we have determined
that a runoff after the November general election is not allowed
under our current or even the old Charter (except in the extreme
unlikelihood of a tie). The original 1912 charter stated,