The Galactic Empire: An Empire Reborn
Imperial Officers' Manual
Major Revision: 2.0 – 2008.10.31
An adaptation of the pre–Endor document and policies.
RIP
... An ISB Lieutenant's Rank Insignia ...

ISB Lieutenant (ISB–LT) is the "entry–level" ISB rank, necessary to be an Additional Agent on any ship of the fleet.

An ISB Lieutenant is granted level 60 X access in #Galactic_Empire.