The **maximum permitted blood alcohol level** for a **novice driver** (someone who has obtained their driving license less than two years ago) is **0.15 milligrams of alcohol per liter of exhaled air**. This is because novice drivers, like drivers of certain special vehicles, have stricter restrictions regarding alcohol consumption.

In comparison, for other drivers and vehicles, the permitted level is **0.25 milligrams per liter of air**. Therefore, novice drivers must be especially careful and ensure they do not exceed this lower level to avoid penalties and ensure road safety.