A taxi driver refuses to use the taximeter for tourists and asks for a much higher cash fare. Why is this especially risky under LTA's framework?

1. It may be overcharging or refusal-to-use-meter conduct that can attract VLPS enforcement, demerit points and licence consequences
2. It is allowed for tourists because they are unfamiliar with fares
3. It is allowed if the driver prints a receipt afterward
4. It is only a customer-service issue with no licensing impact