Questão jurídica principal
Whether the changed circumstances justified modifying the child-support contributions set in the divorce judgment.
Decisão extraída
A modification was justified in principle, but the case had to be recalculated because the lower court wrongly treated future ordinary taxation as already effective.
Fundamentação extraída
The father's partial unemployment was not, by itself, a clearly notable change, but the lower court had to base the calculation on the current source tax actually deducted from salary, not on a hypothetical future ordinary tax assessment.