In the bulk upload CSV, an exclusion code goes in the Citation Codes column of a lab entry whose type is NOL (no lab).
Source row 53, sheet "Testing Exclusions", workbook titled September 2026 Update (CPSC library date 2025-12-18)
In the bulk upload CSV
Add a lab entry of type NOL (no lab) and put the code in its Citation Codes column, for example Lab 2 Type = NOL and Lab 2 Citation Codes = 1278a(b)(5). Use it only when the certificate is required for another rule; the rule it excludes, 1278a, still belongs on the certificate.