Chief Electoral Officer Stephane Perrault recommends voters register within the next week.
The vote can happen no later than Oct. 21, when Orthodox Jews mark Shemini Atzeret.
On Shemini Atzeret, observant Jews can't work, campaign or vote.
Chief electoral officer Stephane Perrault says vetting turned up activities that could be seen as partisan.
The acting elections chief says major changes should have been enacted already.