Here you go.
Merry Christmas and STFU
Here is the actual regulation
§395.3 Maximum driving time for property-carrying vehicles.
(a) Except as otherwise provided in §395.1, no motor carrier shall permit or require any driver used by it to drive a property-carrying commercial motor vehicle, nor shall any such driver drive a property-carrying commercial motor vehicle, regardless of the number of motor carriers using the driver's services, unless the driver complies with the following requirements:
(1) Start of work shift. A driver may not drive without first taking 10 consecutive hours off duty;
(2) 14-hour period. A driver may drive only during a period of 14 consecutive hours after coming on duty following 10 consecutive hours off duty. The driver may not drive after the end of the 14-consecutive-hour period without first taking 10 consecutive hours off duty.
(3) Driving time and rest breaks. (i) Driving time. A driver may drive a total of 11 hours during the 14-hour period specified in paragraph (a)(2) of this section.
(ii) Rest breaks. Except for drivers who qualify for either of the short-haul exceptions in §395.1(e)(1) or (2), driving is not permitted if more than 8 hours have passed since the end of the driver's last off-duty or sleeper-berth period of at least 30 minutes.
(b) No motor carrier shall permit or require a driver of a property-carrying commercial motor vehicle to drive, nor shall any driver drive a property-carrying commercial motor vehicle, regardless of the number of motor carriers using the driver's services, for any period after—
(1) Having been on duty 60 hours in any period of 7 consecutive days if the employing motor carrier does not operate commercial motor vehicles every day of the week; or
(2) Having been on duty 70 hours in any period of 8 consecutive days if the employing motor carrier operates commercial motor vehicles every day of the week.
And here is the FMCSA guidance explaining what operating 7 days a week means.
Guidance for § 395.3: Maximum driving time for property-carrying vehicles.
Question 1: May a motor carrier switch from a 60-hour/7-day limit to a 70-hour/8-day limit or vice versa?
Guidance:
Yes. The only restriction regarding the use of the 70-hour/8-day rule is that the motor carrier must have Commercial Motor Vehicle CMVs operating every day of the week. The 70-hour/8-day rule is a permissive provision in that a motor carrier with vehicles operating every day of the week is not required to use the 70-hour/8-day rules for calculating its drivers’ hours of service. The motor carrier may, however, assign some or all of its drivers to operate under the 70-hour/8-day rule if it so chooses. The assignment of individual drivers to the 60-hour/7-day or the 70-hour/8-day time rule is left to the discretion of the motor carrier.
Question 3: May a carrier which provides occasional, but not regular service on every day of the week, have the option of the 60 hours in 7 days or 70 hours in 8 days with respect to all drivers, during the period in which it operates one or more vehicles on each day of the week?
Guidance:
Yes.