One of the few regulatory changes in recent years that potentially could affect the supply of truck drivers occurred about a month ago when the Federal Motor Carrier Safety Administration required states to downgrade the commercial driver’s licenses (CDLs) of drivers who are in prohibited status in the drug and alcohol clearinghouse. The compliance date for the rule, which was adopted in 2021, was November 18. States must downgrade CDLs within 60 days of being informed of drivers’ prohibited status.