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This final rule implements changes to the CCL that the US committed to as a participating country in the Nuclear Suppliers Group, the 48-member multilateral export-control regime governing transfers of nuclear-related equipment, materials, software, and technology. The rule reflects decisions from two plenary cycles:
nuclear items at the CCL category level.
scope clarifications.
1. ECCN 1B22 decontrol — Water-hydrogen sulfide exchange tray columns and internal contactors are removed from the CCL entirely. These were the only items controlled under ECCN 1B22; with their removal the entry is vacated. Previously controlled for nuclear nonproliferation (NP) reasons, the NSG consensus determined these items no longer warrant multilateral control.
2. ECCN 1B231 clarification — Amended by inserting "hydrogen isotope" before "purification" in item paragraph .b.2. This scoping change makes explicit that only hydrogen isotope purification systems (relevant to heavy-water production for reactors or tritium for weapons) fall within the entry — not hydrogen purification generally.
3. ECCN 3A233 terminology update — "Atomic mass units" replaced with "u" (unified atomic mass unit), reflecting the standard adopted by the scientific community and aligned with IUPAC nomenclature. No substantive scope change.
4–5. Two additional ECCN revisions not individually specified in the Federal Register summary but covered under the overall NSG 2019/2022 alignment package.
sulfide exchange columns, lowering compliance burden for civilian heavy-water reactor equipment suppliers. Net effect is modest deregulation aligned with multilateral consensus.
Exporters should review classification letters and SNAP-R submissions that relied on the prior text.
of NP2 controls on China and Macau (August 14, 2023, FR Doc 2023-17243). Both rules modify the nuclear dual-use section of the CCL in the same rulemaking window, but serve distinct purposes: this rule harmonises multilateral NSG commitments; the China/Macau rule adds country-specific NP2 licensing requirements.
Register summary extract; a full read of the rule text would identify the complete set.
the 4-year gap between the 2019 plenary and this 2023 implementing rule.