The Contractor is required to provide a continuously stocked inventory of reagents, standards, Vendor provided Controls, supplies, disposables and any other materials, to include replacement parts, required to properly perform tests on the equipment such that equipment operations are not interrupted. These items shall be of the highest quality, sensitivity, specificity and tested to assure precision and accuracy. Expiration date must be clearly marked on reagent, standards and control containers. Unexpected changes in methodology/technology shall be at the expense of the Contractor. Alert/Notification of any delays in shipment as well as any or all technical advisory/recalls/alerts, prior to or simultaneously with field alerts should be forwarded to the designated individuals determined at contract award.