Can supporting documents be limited to only those acquired at the beginning and end of the workday?

No. Documents acquired throughout the day are important in enforcing the 60/70-hour rule—a crucial part of ensuring hours of service compliance. Compliance with the 60/70-hour rule is based on the cumulative hours an individual works over a period of days. Supporting documents are critical to verify the proper duty statuses in assessing compliance with the 60/70 hour rules.