Note 24242: NOTE-Containers must be so constructed and sufficiently supplied with refrigerant to maintain a temperature of -12 degrees Centigrade for a 24-hour period for frozen blood or blood plasma; or blood or blood plasma must be chilled to at least 35 degrees Fahrenheit and containers must be supplied with refrigerant sufficient to maintain a temperature of 35 degrees Fahrenheit for a period of seventy-two hours.