R.O.N.

'R.O.N.', or 'Re-open Nominations', is a vote against all subsequent candidates in an election of this type, where candidates are ranked in order of preference, from 1 (most preferable) onwards. So, should the result of an election where there are 2 posts available, be:

1st: John Smith, 450 votes
2nd: R.O.N, 100 votes
3rd: Joe Bloggs, 75 votes

Then John Smith is elected and nominations will re-open for a second election to fill the second position.

If re-open nominations is deemed elected to any position then at the end of the count that position is declared vacant and nominations must later be re-opened for that position.