A Washington applicant wants to add School Bus authority to a CDL for public school transportation. Which preparation path is most complete?

1. Study only the DOL fee page because fees are the main test content
2. Study Washington CDL Section 10 and passenger material, complete required ELDT or state training, pass the Passenger and School Bus knowledge tests, use the proper school bus for skills testing, and meet OSPI authorization rules if driving public school students
3. Skip Passenger qualification because S replaces P
4. Take only the General Knowledge test because endorsements are optional for school buses