What does the Road Transport Act 2013 section 110 address?

The Road Transport Act 2013, specifically section 110, deals with the prescribed concentration of alcohol (PCA) for drivers. This section outlines the legal limits of blood alcohol concentration that drivers must adhere to while operating a motor vehicle. It is crucial for the enforcement of drink-driving laws and sets out the penalties for those who exceed these limits. Understanding this aspect of the law is essential for ensuring road safety and compliance with regulations regarding alcohol consumption and driving.

The other options focus on different aspects of road transport legislation, such as unlicensed driving, driving under the influence in a broader sense that may not specifically address alcohol concentration, and specific traffic rules like stopping at traffic signals. However, section 110 is explicitly focused on the regulation of alcohol levels in drivers' blood, making "prescribed concentration of alcohol" the most accurate choice.