A Colorado applicant completes the school bus written exam but has not completed required ELDT or the school bus skills test. What is the best conclusion?

1. The S endorsement is complete because the written exam is enough
2. The S endorsement is not complete because Colorado also requires required ELDT and a full drive skills test in a school bus
3. The applicant can transport students if the bus is empty on the first trip
4. The applicant can substitute a tanker endorsement skills test