120.1716—Required SBA approval of servicing actions.
         Seller shall not, without prior written consent of SBA, take the following actions with respect to Seller's Pool Loan:
    
    
        
        (a) 
         Make or consent to any substantial alteration in the terms (“substantial” includes, but is not limited to, any changes to the principal amount or interest rate);
    
    
    
    
        
        (d) 
         Waive or release any claim. Guidance on other servicing actions, some of which may need prior SBA approval, is provided in the Guide.