This offer is subject to upgrade vehicle availability at time and place of rental.  Highest obtainable upgrade is to a Premium class vehicle.  Brand and model are not guaranteed. Advance reservations are required.  Blackout periods may apply. This offer is redeemable at participating Hertz locations in the U.S., Canada and Puerto Rico, has no cash value, may not be used with Pre-pay Rates, Tour Rates or Insurance Replacement Rates and cannot be combined with any other certificate, voucher, offer or promotion. Hertz age, driver, credit, daily, weekly and weekend rate qualifications for the renting location apply and the car must be returned to that location.  Offer valid for vehicle pickup through 12-31-09.