In order that an employee be exempt from the overtime provisions of
the Act under section 13(b)(11) he must be employed as a driver or
driver's helper making local deliveries, and, he must be compensated for
such employment on a trip rate basis or other delivery payment plan, and
such plan must be found by the Secretary to have the general purpose and
effect of reducing the hours worked by the driver or driver's helper to,
or below, the maximum workweek applicable to him under section 7(a) of
the Act. If all the preceding conditions are not met the exemption is
inapplicable.