What is the mandatory program duration before an Ignition Interlock Device can be installed for a 2nd offence within 10 years?

Answer: A — 6 months suspension

The mandatory program duration before an Ignition Interlock Device can be installed for a 2nd offence within 10 years is 6 months suspension. This means that the offender's license will be suspended for 6 months before they can install an Ignition Interlock Device in their vehicle. The other options, such as 12 months suspension, 3 days suspension, and 5 years Ignition Interlock Term, are incorrect because they do not match the mandatory duration stated in the question. 12 months suspension is too long, 3 days suspension is too short, and 5 years Ignition Interlock Term is too specific in terms of duration. Therefore, option A is the correct answer as it closely matches the mandatory program duration mentioned in the question.