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| Chart 1: Minimum levels of supervision. Comparison of Grades 1 and 2. | ||
| Considerations | Grade 1 | |
| Doors | Opening | Opening perimeter |
| Windows | Opening | |
| Other opening sections | Opening | |
| Room | Trap | Trap |
| Chart 2: Tamper detection. Comparison of Grades 1 and 2. | ||
| Tamper detection | Grade 1 | Grade 2 |
| Control & indicating equipment (CIE) * | Yes | Yes |
| Ancillary control equipment (ACE) * | Yes | Yes |
| Alarm transmission equipment (ATE) * | Yes | Yes |
| Power supply units (PSU) * | Yes | Yes |
| Detection devices | No | Yes |
| Junction boxes | No | Yes |
| * equipment issue | ||