A routine quarantine is also sometimes called an interdiction.
In general however, an interdiction prevents a class of congress, communication, or interaction between a species or world, or a set of world, and another species, world or set of worlds. An interdiction is a carefully planned action, as opposed to a total quarantine. For instance, the interdiction of Platonia is intended to have several specific results:
- Control access to a restricted chemical
- Ease the Sahndaran colonists into some form of long term association with the UFP, and to aid them in establishment of their privacy.
- Develop and test colonization on this planet, which, aside from a restricted substance, and the existence of 40 immortal sentient beings, is a very fine Class M world.
The Platonia interdiction prevents direct contact between Sahndarans and members of UFP who are not contact trained personnel, and restricts trade and intercourse with the new UFP colonists, in order to control the restricted substance found on the surface of the planet.
Interdictions may be established under Captain' prerogative, but must ultimately devolve, for short-term interdictions, to Star Fleet Operations, or to the Star Fleet Interdiction Command.