The original BARS Audit compared with the BARS Stage 2 Audit streams.
| BARS Program Audit (current)  | 
BARS Stage 2 Core Audit  | 
BARS Stage 2 Comprehensive Audit | |
| Aircraft Operator Initial BARS Registration | Four-Auditor-day Audit (2*2) | Four-Auditor-day Initial Audit | Four-Auditor-day Initial Audit | 
| Green  (Core Registration or Comprehensive Registration)  | 
Four-Auditor-day Audit (2*2) | Option to remain at Green with an annual, two-Auditor-day (2*1) Core Renewal Audit
 Must meet Renewal Audit and close-out deadlines to retain BARS registration  | 
Option to do a four-Auditor-day Comprehensive Audit (2*2) to advance to Silver | 
| Silver (Comprehensive Registration only)  | 
Four-Auditor-day Audit (2*2) | For Silver or to advance to Gold, must do four-Auditor-day Comprehensive Renewal Audits (2*2)
 Must meet audit and close-out deadlines to retain Silver or to advance to Gold or will be returned to Green  | 
|
| Gold
 (Comprehensive Registration only)  | 
Four-Auditor-day Audit (2*2) every second year | To retain Gold, must do four-Auditor-day Comprehensive audits every second year
 Need to do reduced-load Monitoring Audit (2*1) every other year Must meet audit and close-out deadlines to retain Gold or will be returned to Green  | 
