Key legal question
Whether the husband's 2017 tax assessment had to be included when determining his income for child maintenance
Extracted holding
The 2017 assessment was an outlier and did not have to be taken into account; the income could properly be based on the prior three years.
Extracted reasoning
For self-employed persons, income is usually determined by averaging several years to account for fluctuations. The 2017 figures were markedly below prior years and were supported by evidence of unusually high depreciation, interest, asset purchases and bank liabilities, indicating an exceptional year rather than a sustained decline.