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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
                            - Subchapter 1 Agreements on rent
- Subchapter 1a Agreements on rent amount upon commencement of a lease in areas with an overstretched housing market
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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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                            Chapter 2 Rent
                            
 
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                        Subtitle 2 Leases for residential space
                        
 
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                    Title 5 Lease, usufructuary lease
                    
 
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                Division 8 Particular types of obligations
                
 
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            Book 2 Law of Obligations