In the case of Swanson et al., Trustees v. Commissioner of Internal Revenue, 1935, the U.S. Supreme Court ruled on a matter concerning tax law and trust income distribution. The trustees in question had distributed all their income to beneficiaries but were still held liable for surtaxes by the Commissioner of Internal Revenue under Section 219(h) of the Revenue Act of 1924. This section stipulated that trusts should be treated as associations if they possessed any one out of six characteristics typical to corporations; however, it was unclear whether this applied when all income was distributed directly to beneficiaries without being touched by trustees. The court decided in favor of Swanson et al., ruling that trusts distributing all their net income among beneficiaries could not be taxed as associations under Section 219(h). They reasoned that since no partaking or benefit from profits occurred at trustee level - a key characteristic defining an association - such entities did not fall within its purview.

In the dissenting opinion for Swanson v. Commissioner of Internal Revenue, it was argued that the majority's decision to allow a trust fund established by Mr. and Mrs. Swanson to be taxed as an association rather than a trust contradicted previous court rulings on similar cases and misinterpreted tax law provisions. The dissenting justices believed that this ruling would set a dangerous precedent where any group of trustees could potentially be classified as an "association" under tax laws, leading to higher taxation rates despite their function being more akin to trusts than associations or corporations. They also disagreed with the majority's interpretation of what constitutes conducting business activities in relation to trusts, arguing that managing investments should not qualify as such since it is inherent in maintaining any form of property ownership.