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        Dannemann/Schulze, German Civil Code, Volume I
        
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            Book 2 Law of Obligations
            
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                Division 8 Particular types of obligations
                
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                    Title 5 Lease, usufructuary lease
                    
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                        Subtitle 2 Leases for residential space
                        
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                            Chapter 2 Rent
                            
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                                Subchapter 2 Provisions on the rent amount
                                
- § 557 Increases in agreement or by law
 - § 557a Stepped rent
 - § 557b Indexed rent
 - § 558 Increase in rent up to the reference rent customary in the locality
 - § 559 Rent increase after modernisation measures
 - § 559a Crediting of third-party funds
 - § 559b Assertion of an increase; effect of declaration of increase
 - § 559c Simplified procedure
 - § 559d Breach of duty in announcing or implementing a structural change
 - § 560 Changes in operating costs
 - § 561 Special right of termination of the lessee following a rent increase
 
 
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                                Subchapter 2 Provisions on the rent amount
                                
 
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                            Chapter 2 Rent
                            
 
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                        Subtitle 2 Leases for residential space
                        
 
 - 
                    
                      
                        
                      
                    
                    Title 5 Lease, usufructuary lease
                    
 
 - 
                
                  
                    
                  
                
                Division 8 Particular types of obligations
                
 
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            Book 2 Law of Obligations