You are administering the contract for maintenance on the space shuttles and have just been informed by your Contracting Officer's Representative (COR) that 2 of the pressure seals in the shuttle are showing signs of deterioration and must be replaced before the scheduled launch, 12 days from now. Your COR also indicates that there is a newly developed seal that can withstand a greater temperature and pressure ranges, and he insists that the two seals be replaced with this new seal. What method of action should you take?