10 CFR §39.51
Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗
The licensee may use a sealed source in a well without a surface casing for protecting fresh water aquifers only if the licensee follows a procedure for reducing the probability of the source becoming lodged in the well. The procedure must be approved by the Commission pursuant to § 39.13(c) or by an Agreement State.