It is the recipient's responsibility to ensure that costs incurred are in accordance with the applicable cost principles, meaning the costs are (1) reasonable: costs which are generally recognized as ordinary and necessary and would be incurred by a prudent person in the conduct of normal business; (2) allocable: incurred specifically for this award; and (3) allowable: conform to any limitations in this award. The recipient must obtain any prior written approvals from the AO that are required by the applicable cost principles. The recipient may obtain the AO’s written determination on whether specific costs not clearly addressed in the applicable cost principles are allowable or allocable. The AO reserves the right to make a final determination on the allowability of costs.