eCFR
49 CFR 180.413 — Repair, Modification, Stretching, Rebarrelling, or Mounting
Who may repair or modify a specification cargo tank, and under what rules.
The rules for any work that changes a specification cargo tank: repair, modification, stretching, rebarrelling or mounting.
Open it before anyone strikes an arc on a spec tank. It’s the section that answers “can we do this job, and what has to happen after?”
Read the current text on eCFR before the work starts, not after.