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

Candidate passages:
The prize for each leg is awarded to the first place team for that leg and to the top three teams.
Leg 1 – The "Passe Direto ("Express Pass")" – an item that can be used on the race to skip any task of the team's choosing and a Blackberry Bold for each team member.
Leg 2 – A Survival kit for each team member.
Leg 3 – A Heart rate monitor for each team member.
Leg 4 – A HD Camera for Extreme Sports for each team member.
Leg 5 – A GPS for each team member.
Leg 6 – A Flip Camera for each team member.
Leg 7 – A Video game console for each team member.
Leg 8 – A Digital audio player for each team member.
Leg 9 – A Bicycle for each team member.
Leg 10 – A Digital Camera for each team member.
Leg 11 – A Blackberry Tablet for each team member.
Leg 12.1 – A LED TV for each team member.
Leg 12.2: *1st Place: Daniel & César – US$250,000 *2nd Place: Fer & Ferds – A trip for four to Riviera Maya, Mexico.
*3rd Place: Edu & Rick – A trip for four to Orlando, Florida, USA.  
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 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 –   
The prize for each leg is awarded to the first place team for that leg.
Trips are sponsored by Travelocity Leg 1 – The "Express Pass" – an item that can be used on the race to skip any one task of the team's choosing up until the 8th leg.
Leg 2 – A trip for two to Grenada Leg 3 – A trip for two to the Atlantis Paradise Island in the Bahamas Leg 4 – each  Leg 5 – A trip for two to Thailand Leg 6 – A 2013 Ford Taurus SHO for each Leg 7 – A trip for two to Costa Rica Leg 8 – A trip for two to Hanalei Bay, Hawaii Leg 9 – A trip for two to Saint Lucia Leg 10 – each Leg 11 – A trip for two to New Zealand Leg 12 –   The winners of the fourth leg (Art & JJ) elected to split their $10,000 prize with Bopper and Mark.  
The prize for each leg is awarded to the first place team for that leg.
All trips are sponsored by Travelocity.
Leg 1 – The "Express Pass" – an item that can be used on the race to skip any one task of the team's choosing up until Leg 8.
Leg 2 – A trip for two to Hawaii.
Leg 3 – $5,000 for each team member.
Leg 4 – A trip for two to Belize.
Leg 5 – A trip for two to Costa Rica.
Leg 6 – A trip for two to São Paulo, Brazil.
Leg 7 – $5,000 for each team member.
Leg 8 – A trip for two to Belize.
Leg 9 – $15,000 Discover gift card.
Leg 10 – A trip for two to Rio de Janeiro, Brazil.
Leg 11 – A trip for two to Iguazu Falls, Argentina.
Leg 12 – $1,000,000