A Maryland CLP holder with an S endorsement is accompanied by a CDL holder who has operated the required class and type for only six months. What is the issue?

1. Maryland requires the accompanying driver to hold the required CDL for that class and type for three years or more
2. No accompanying driver is needed if the CLP has an S endorsement
3. Six months is enough if the bus is empty of fuel
4. The accompanying driver only needs a non-commercial license