CFR › Title 46 › Part 54 › §54.01-1746 CFR §54.01-17Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkPressure vessels for human occupancy (PVHOs) must meet the requirements of subpart B (Commercial Diving Operations) of part 197 of this chapter.