Storyline 3 licenses, according to the End-User License Agreement (EULA), are tied to individuals and are generally non-transferable, except in special circumstances.
With Articulate 360 license seats, the situation is slightly different. You have the ability to transfer licenses up to twice the number of licenses in your account within a 12-month period. For example, if your team has 10 licenses, you can perform 20 transfers per year.