Final answer:
The security deposit required for a Select Licence holder with 8 or more demerit points varies by jurisdiction, with sanctions including fines, driving courses, or an SD to ensure driving law compliance.
Step-by-step explanation:
The requirement for a security deposit (SD) for someone holding a Select Licence (SL) and who has accumulated 8 or more demerit points in the past 12 months tends to vary depending on the specific rules and regulations of the jurisdiction that issued the licence. In many places, the accumulation of demerit points can lead to sanctions such as fines, mandatory driving courses, or the imposition of a security deposit to ensure compliance with driving laws.
However, without a specific jurisdiction or governing body mentioned, it's impossible to provide a definitive answer about the required SD, as demerit point systems and their corresponding penalties differ greatly around the world.