Question: What position does a team have to take to win each leg of this race?
About the article "The Amazing Race 21", section "Prizes".

Candidate passages:
A relay race is run by a team of competitors each running a course, and the result is based on the team's total time.
Relays usually employ a mass start instead of a staggered start.
To reduce competitors following each other, various spreading methods might be used.
This is called "gaffling", which is a Swedish word meaning "forking".
The key principle is that every team must run every leg (between each pair of two controls), but not necessarily in the same order.
The IOF have introduced the nomenclature to try to clarify the usage of the word "leg".
In orienteering usage, leg normally refers to the part of a race between two control points.
In relay (non-orienteering) usage, leg refers to the part of a race run by a single team member.
The IOF prefer "lap" for this latter term, but despite this, in common parlance, "leg" is used for both terms. 
The prize for each leg is awarded to the first place team for that leg.
Trips are sponsored by Travelocity.
Leg 1 – Two "Express Passes" – an item that can be used on the race to skip any one task of the team's choosing.
The winning team keeps one for themselves but must relinquish the second to another team before the end of the fourth leg of the race.
Leg 2 – A trip for two to London  Leg 3 – A trip for two to Bangkok  Leg 4 – each  Leg 5 – A ski trip for two to Whistler  Leg 6 – A trip for two to Phuket  Leg 7 – each  Leg 8 – A trip for two to Bora Bora  Leg 9 – A 2013 Ford Fusion for each  Leg 10 – each  Leg 11 – A trip for two to the Dominican Republic  Leg 12 –   
The French Road Cycling Cup (English for Coupe de France de cyclisme sur route) is a road bicycle racing competition under the Fédération Francaise de Cyclisme (French Cycling Federation) each year since 1992.
It consists of a number of standalone races in France each year.
Each of these races is open for all riders, but only French riders and riders who are part of a French team are able to score points for the French Road Cycling Cup.
For the individual rankings, points are awarded to all eligible riders each race according to the following table:Each race, the positions of the first three riders of each French team are added to give the team position.
The team with the lowest team position is the winner of the team competition for that race.
E.g.
: a team having their first three riders all on the podium will have a team position score of 1+2+3=6 and since no other team will have a lower team position, this team will win 12 points for the team standings.
Note that only French teams can score points. 
Race legs.
Each leg of "The Amazing Race" generally consists of teams leaving from the previous Pit Stop and traveling to a different location (often in a different country), where they perform two or more tasks, generally including one Detour and one Roadblock, before being given instructions to go to the next Pit Stop.
It is each team's goal to complete each leg as quickly as possible, as the first team to check in at the Pit Stop will win a prize; the prizes have included all-expenses paid trips, new cars or other vehicles, money, entertainment provided during the Pit Stop, and recently advantages to be used during the race (see Express Pass, Salvage Pass, and Double Your Money).
The last team to arrive at the Pit Stop will generally be eliminated from the competition, but occasionally the team is allowed to continue racing although they will be given a Race-imposed disadvantage in the next leg (see Non-elimination leg).
When teams are otherwise not performing tasks or traveling during a leg, they are free to use their time as they see fit, although they will often resort to eating cheaply or sleeping outside a location to save their "Race" money. 
The prize for each leg is awarded to the first place team for that leg.
Trips are sponsored by Travelocity.
Leg 1 – Two "Express Passes" – an item that can be used on the race to skip any one task of the team's choosing.
The winning team keeps one for themselves but must relinquish the second to another team before the end of the fifth leg of the race.
Leg 2 – A trip for two to the Turks and Caicos Islands  Leg 3 – A trip for two to Costa Rica  Leg 4 – each  Leg 5 – A trip for two to Hawaii  Leg 6 – A trip for two to Anguilla   Leg 7 – A trip for two to Paris  Leg 8 – A choice of any two of Ford's Eco-Boost vehicles  Leg 9 – each   Leg 10 – A trip for two to Cancún  Leg 11 – A trip for two to Aruba  Leg 12 –