What action must an All County franchisee take if there is a challenge to the validity of the Marks?

• 14.8. Infringement and Claims of Marks. You shall promptly notify us of any suspected unauthorized use of the Marks, any challenge to the validity of the Marks, or any challenge to our ownership of, our right to use and to license others to use, or your right to use, the Marks. You acknowledge that we have the sole right to direct and control any administrative proceeding or litigation involving the Marks, including any settlement thereof. We have the right, but not the obligation, to take action against uses by others that may constitute infringement of the Marks. We shall defend you against any third party claim, suit, or demand arising out of your use of the Marks. If we, in our sole business judgment, determine that you have used the Marks in accordance with this Agreement, the cost of such defense, including the cost of any judgment or settlement, shall be borne by us. If we, in our sole business judgment, determine that you have not used the Marks in accordance with this Agreement, the cost of such defense, including the cost of any judgment or settlement, shall be borne by you. In the event of any litigation relati

Source: Item 23 — Receipts (FDD pages 43–157)