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RADIATION SYMBOL (1) bladed areas must be magenta or purple; (2) background must be yellow or white. Click to view (b) In addition to the contents of signs and labels prescribed in this section, a registrant may provide on or near the signs and labels any additional information that may be appropriate in aiding an individual to minimize exposure to ionizing radiation. (c) Each ionizing radiation area must be conspicuously posted with a sign or signs bearing the ionizing radiation caution symbol and either of the following words:

(1) CAUTION RADIATION AREA

(2) DANGER RADIATION AREA (d) Each high ionizing radiation area must be conspicuously posted with a sign or signs bearing the ionizing radiation caution symbol and either of the following words:

(1) CAUTION HIGH RADIATION AREA

(2) DANGER HIGH RADIATION AREA (e) Each high ionizing radiation area must be equipped with a control device that will either cause the level of ionizing radiation to be reduced below that at which an individual may receive a dose of one millisievert in one hour upon entry into the area or will energize a conspicuous visible or audible alarm signal in a manner that the individual entering and the registrant, or supervisor of the area, are made aware of the entry. A control device is not required for a high ionizing radiation area established for a period of 30 days or less.