ZPS ongoing public procedure
 | immediate safeguard zone [Zone I] |
 | closer safeguard zone [Zone II] |
 | closer safeguard zone with higher vulnerability [Zone II-V1] |
 | distant safeguard zones [Zone III] |
| immediate safeguard zone [Zone I] |
| closer safeguard zone [Zone II] |
| closer safeguard zone with higher vulnerability [Zone II-V1] |
| distant safeguard zones [Zone III] |