The Pay Group for a Graduate Student in the Union is GST versus non-Union Graduate Student is CST. Departments need to determine whether or not someone is included in the Grad Student Union and can then make any needed adjustments by Terming the existing job through the eServe Workforce Portal and entering a new Job through ePAF.
The Graduate Student Union Job Codes will end in "U"-
9910U is Teaching Assistant (Doctoral)
9911U is Research Assistant (Doctoral)
9912U is Graduate Instructor (Doctoral)
See
Vertical Decision Tree for GSAS Student Union Eligibility