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. Offer is redeemable at participating Hertz airport locations in the U.S., Canada and Puerto Rico, has no cash value and may not be used with Pre-pay Rates, Tour Rates or Insurance Replacement Rates. This offer may not be combined with any other certificate, voucher, offer or promotion. Hertz age, driver, credit, qualifying daily, weekly and weekend rate restrictions for the renting location apply. Taxes, tax reimbursement, age differential charges, fees and optional service charges, such as refueling, are not included. Discounts apply to time and mileage charges only. DIscounts in local currency on redemption. Offer valid for vehicle pickup through 12-31-10.