What is the Immediate Roadside Sanction (IRS) WARN program?

• When a driver has a blood alcohol concentration that is equal to or exceeds 50 milligrams of alcohol in 100 mililitres of blood.
  Explanation:

  "The Immediate Roadside Sanction (IRS): WARN program applies when a law enforcement officer has reasonable grounds to believe that a driver has operated a motor vehicle with a blood alcohol concentration that is equal to or exceeds 50 milligrams of alcohol in 100 mililitres of blood."
• When a driver has a blood alcohol concentration that is equal to or exceeds 60 milligrams of alcohol in 100 mililitres of blood.
• When a driver has a blood alcohol concentration that is equal to or exceeds 50 milligrams of alcohol in 200 mililitres of blood.
• When a driver has a blood alcohol concentration that is equal to or exceeds 50 milligrams of alcohol in 300 mililitres of blood.