Employers must identify all permit-required confined spaces (containing serious physical hazard: hazardous atmosphere, engulfment, entrapment, or other recognized hazard), post danger signs, test atmospheric conditions before and during entry (in sequence: oxygen, combustibles, toxics), maintain an attendant outside at all times during entry, and retain entry permits for 1 year for annual program review.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.