137.364—What constitutes a significant change in the original scope of work?
         A significant change in the original scope of work is:
    
    
        
        (a) 
         A change that would result in a cost that exceeds the total of the project funds available and the Self-Governance Tribe's contingency funds; or
    
    
        
        (b) 
         A material departure from the original scope of work, including substantial departure from timelines negotiated in the construction project agreement.