Any person acquiring a manufacturer, or who has acquired a manufacturer, shall have all responsibility for the acquired company's covered electronic products, including covered electronic products manufactured prior to July 1, 2006, unless that responsibility remains with another entity per the purchase agreement and the acquiring manufacturer provides the department with a letter from the other entity accepting responsibility for the covered electronic products. Cobranding manufacturers may negotiate with retailers for responsibility for those products and must notify the department of the results of their negotiations.