View all text of Subpart E [§ 172.400 - § 172.450]
§ 172.440 - RADIOACTIVE YELLOW-III label.
(a) Except for size and color, the RADIOACTIVE YELLOW-III label must be as follows:

(b) In addition to complying with § 172.407, the background color on the RADIOACTIVE YELLOW-III label must be yellow in the top half and white in the lower half. The printing and symbol must be black, except for the “III” which must be red.