Request for clarification of approved mechanism methodology: Applicability of A6.4-AMM-002 (ver. 01.0) to existing nitric acid production lines replaced by one new line through a retrofit before introduction of N2O abatement Reference number: A6.4-AMM-CLA-002 Submitted by First Climate (Switzerland) AG Request A6.4-FORM-METH-009 Reference to the approved mechanism methodology to which the request for clarification applies A6.4-AMM-002: N2O abatement from nitric acid production MEP meeting MEP 017 (30 November - 4 December 2026) Final response Current status 22 October 2026: Initial assessment: Qualified Submission history 30 September 2026: Submission received