This Agreement and its attachments represent the entire agreement regarding the subjects herein between ABG and GM and may be modified only in a writing executed by an authorized representative of each of the Parties. This Agreement governs the purchase of, and incentives provided for, 2018 Model Year vehicles. This Agreement places no obligations on either party regarding 2019 Model Year vehicles; ABG is under no obligation to submit orders for 2019 Model Year vehicles and GM is under no obligation to pay incentives on 2019 Model Year vehicles (even if ABG places early orders for such vehicles prior to the execution of a 2019 Model Year agreement). The purchase of, and incentives provided for, 2019 Model Year vehicles will be governed by a separate 2019 Model Year agreement mutually agreed upon by the parties.