Mont. Code Ann. § 50-33-104

No blood bank or tissue bank may be held liable in the absence of fault or negligence for injuries resulting from the injecting, transfusing, transplanting, or transferring of whole blood, plasma, blood products, blood derivatives, human tissue, organs, or bones supplied by any such blood bank or tissue bank to any hospital or physician if such blood products or tissue products have been tested by the latest testing procedures in accordance with recommendations of the American association of blood banks or the American association of tissue banks and by such test are not found to be dangerous to the health of the recipient of such blood products or tissue products.