Purchaser will not perform repairs, maintenance or other servicing of the Products unless (a) an operations manual for the Products expressly authorizes Purchaser to perform such repairs, maintenance or other servicing of the Products or (b) CHEM has trained Purchaser to perform such repairs, maintenance or other servicing of the Products. All other repairs, maintenance or other servicing of the Products will only be performed by CHEM or an authorized representative of CHEM. Without limiting the generality of the foregoing sentences, Purchaser will not use any replacement part or accessory for the Products unless such replacement part or accessory is provided by CHEM or expressly approved in advance by CHEM. In addition to any other remedy available to CHEM by contract, at law or in equity (including, without limitation, injunctive relief, specific performance and recovery of damages), any repairs, maintenance and servicing performed outside the scope of this Section 5 will void the warranties set forth in Section 6.1.