Code 7-10

Code 7-10 was a communications code used by the Federation Starfleet. Also known as a "quarantine code," it meant that the recipient was to "under no circumstances approach (the originator of the transmission)." It did not allow for exceptions.

In the mid-23rd century, the civilization on Eminiar VII replied to an initial diplomatic overture with this code because they did not wish the USS Enterprise (NCC-1701) to become involved in the war they were fighting with Vendikar, another planet in their system. 

Code 7-10