301-11.524—What steps must my agency take to determine my ITRA?
         Your agency should:
    
    
        
        (a) 
         Determine Federal, State and local marginal tax rates by using the procedures and the marginal tax tables established for the relocation income tax allowance in  § 302-11.7,  § 302-11.8, and the appropriate RIT tax table(s) located at www.gsa.gov/ftrbulletin; or