| Name | Description | Episode |
| Regulation 157 Section III Paragraph 18 | Part of the temporal prime directive - "Starfleet officers shall take all necessary precautions to minimize any participation in historical events." | Trials and Tribble-ations |
| Canon source | Backstage source | Novel source | DITL speculation |
| © Graham & Ian Kennedy | Page views : 219,235 | Last updated : 28 Apr 2024 |