Herc Rentals? Why do I need an X endorsement?

§391.31 Road test.

Guidance Q&A
Question 1: Are employers still required to administer road tests since all States have implemented CDL skills testing?

Guidance: The employer may accept a CDL in lieu of a road test if the driver is required to successfully complete a road test to obtain a CDL in the State of issuance. However, if the employer intends to assign to the driver a vehicle necessitating the doubles/triples or tank vehicle endorsement, the employer must administer the road test under §391.31 in a representative vehicle.