A Pennsylvania applicant wants to drive a school bus designed for 12 people including the driver. Which endorsement issue is most accurate?

1. The applicant must address school bus requirements, and PennDOT shows school bus operation requires both P and S endorsement authority
2. No CDL endorsement can apply because the bus has fewer than 16 seats
3. Only a Doubles/Triples endorsement is required
4. Only a Hazmat endorsement is required because students are passengers