Good point John, found this: from here:
http://news.bbc.co.uk/sport1/hi/tv_and_radio/sports_personality_of_the_year/7735134.stm
Nomination process of contenders for final 10:
The nominations are provided by a panel of over 30 leading sporting experts from a selection of newspaper sports editors (national and regional) and magazines.
This process begins on Monday 3 November and ends on Friday 14 November. The sporting experts will be asked to name their 10 contenders in alphabetical order and not in any order of preference.
The shortlist of 10 contenders will be announced during 'The One Show' on Monday 1 December (BBC One, 1900 GMT) and will also appear on the BBC Sports Personality website.
In the event of a tie at the end of the nomination process, the Sports Personality production team will contact the Sports Personality former winners judging panel for their preferred 1-2-3 contenders in order. The panel consists of six former winners from a cross section of sports.
Three points will be awarded for first place, two points for second place, one point for third place. The tied contender with the most points will go through to the final shortlist of 10. In the unlikely event there is still a tie, the tied contender with the most first places from this second round of voting will go through to the final 10.
Vote on the night
The public only will decide the winner from the shortlist of 10 contenders during the live show with a phone vote. This will be overseen by an independent adjudicator.
A full list of the number of votes polled by each contender will be available on the BBC Sports Personality website after the show along with all terms and conditions.