N.M. Code R. § 20.3.12.25
The licensee may use a uranium sinker bar in well logging applications only if it is legibly impressed with the words ”Caution - radioactive - depleted uranium” and “Notify civil authorities (or name of company) if found.”
[20.3.12.25 NMAC - Rp, 20.3.12.1200 NMAC, 6/30/2011]