(a) The licensee shall ensure that each container of licensed material bears a durable, clearly visible label bearing the radiation symbol and the words ‘‘CAUTION, RADIOACTIVE MATERIAL’’ or ‘‘DANGER, RADIOACTIVE MATERIAL.’’ The label must also provide sufficient information (such as the radionuclide(s) present, an estimate of the quantity of radioactivity, the date for which the activity is estimated, radiation levels, kinds ofmaterials, and mass enrichment) to permit individuals handling or using the containers, or working in the vicinity of the containers, to take precautio