Staad US Std Design Code

I have concern regarding Staad US Design Code, we had 1 license for Staad US Design Code and 2 licenses for StaadPro (see below screenshot). Do we need to buy new license for Staad US Design Code, for us to use the 2nd license of StaadPro with Staad US Design Code? Is it a sepearate license?

Thank you very much.

Mary Ann