GRSG-131-16
UN R158: Proposal for Supplement 7 to the original version
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The Special Interest Group on Component & Separate Technical Unit (SIG-C&STU) for the Supplement of UN Regulations 151, 158, 159 and 166. Proposal adds Component and Separate Technical Units (STU) approvals requirements.
Separate Technical Unit: Refers to the approval of a component in a larger system subject to the same regulation.