Questão jurídica principal
Whether the child support agreement could be modified under Art. 286(2) ZGB due to changed circumstances.
Decisão extraída
The conditions for modification were not met because there was no substantial and lasting change compared with the father's sustainable prior income.
Fundamentação extraída
The father's income at the time of the agreement had been earned through an unsustainable work load above 100%. For comparison, only income based on a realistic 100% workload counts. With a comparable or higher hypothetical earning capacity, the alleged decline was not substantial; moreover, the income drop resulted from a voluntary self-employment choice and was not lasting.