Viskauskas v Niland

The High Court of Australia considered the dispute between Viskauskas and Niland concerning the validity of a contract for the sale of land. The central issue revolved around whether the contract was void for uncertainty or illegality, specifically in relation to a clause that purported to grant the purchaser an option to repurchase the land.

The court was required to determine whether the option clause rendered the entire contract void for uncertainty, or alternatively, whether the option clause was void for illegality under the provisions of the *Land Sales Act 1970* (NSW). If the option clause was found to be illegal, the court also had to consider whether its illegality tainted the entire contract, thereby rendering it void ab initio.

The High Court held that the option clause was not void for uncertainty. However, it was found to be illegal and therefore void under the *Land Sales Act 1970* (NSW) because it constituted a "collateral advantage" that was not disclosed to the vendor and was designed to circumvent the provisions of the Act. Despite the illegality of the option clause, the court determined that the main contract for the sale of land remained valid and enforceable. This was because the illegal part of the contract (the option clause) could be severed from the main agreement, and the remaining contract was capable of standing on its own. The court applied the principle of severability, allowing the valid part of the contract to be upheld while excising the illegal provision.

Consequently, the High Court ordered that the appeal be dismissed, upholding the validity of the contract for the sale of land, notwithstanding the illegality of the repurchase option.