Key legal question
How are maintenance contributions indexed when the consumer price index changes by 5% or more?
Extracted holding
Maintenance contributions are adjusted in line with the change in the index as of the beginning of the following month, unless the maintenance debtor proves that his income has not kept pace with inflation.
Extracted reasoning
The contributions are based on the National Consumer Price Index published by the Federal Office for Statistics at March 2010 (103.8 points, December 2005 base). Under the practice of the 5% clause, a change of 5% or more from the original index level triggers a corresponding adjustment.