You should list R.O.N as a preference if you feel that the candidates you have not yet listed are not suitable for that position.
Note: Voting for R.O.N is an active vote AGAINST the remaining candidates. To express indifference, choose 'No Further Preference'.
If Re-Open Nominations is elected to any position then nominations for the election will be re-opened at a later date and the election for that position may be held in the next election period.
You may continue listing candidates after you have listed R.O.N. as before you should list them in order of preference.