Regular Hours:Prescriptions are verified automatically if the prescriber doesn’t respond to the seller’s verification request within “eight-business-hours.” A business hour is defined as one hour between 9 a.m. and 5 p.m., Monday through Friday, excluding federal holidays, in the prescriber’s time zone. If a seller determines that a particular prescriber has regular Saturday business hours, the seller also may count those Saturday hours as business hours under the Rule.