Under KCAA Personnel Licensing (PEL) regulations, what is the minimum currency requirement for an Air Traffic Controller rating to remain valid?

1. The controller must have exercised the privileges of the rating for at least 10 hours in the preceding 90 days.
2. The controller must have exercised the privileges of the rating for at least 40 hours in the preceding 90 days.
3. The controller must undergo a practical simulation check every 30 days.
4. The controller must log at least 50 hours of active control time every 12 months.