Business Aviation Corporation (Pty) Ltd v Rand Airport Holdings (Pty) Ltd

The appellants (defendants) occupied parts of the Rand Airport near Johannesburg under an oral lease agreement from the respondent (plaintiff). The plaintiff sought eviction on the basis that the lease was a monthly tenancy that had been terminated by proper notice. The defendants raised two defences: (1) that the lease was a long-term lease entitling them to occupy for at least another five years, and (2) that they had spent several million rand on necessary and useful improvements to the property without compensation and were entitled to an enrichment lien to retain possession until compensated. The magistrate's court rejected both defences and granted the eviction order. The High Court dismissed the appeal. The defendants were granted leave to appeal to the Supreme Court of Appeal only on the issue of whether an enrichment lien existed in law, as the credibility findings regarding the long-term lease defence stood.

• Whether lessees of urban property have an enrichment lien (ius retentionis) allowing them to retain possession until compensated for improvements effected during the lease
• Whether the placaeten of 1658 and 1696 (Dutch legislative enactments restricting lessees' rights to compensation for improvements and abolishing enrichment liens) apply to urban leases or are limited to agricultural/rural leases
• Whether previous obiter dicta suggesting the placaeten apply to urban leases should be followed as settled law despite being based on erroneous interpretations

Appeal upheld with costs. The order of the High Court was set aside and replaced with an order upholding the appeal with costs and referring the matter back to the magistrate's court for continuation of the trial on the outstanding issues relating to the enrichment lien.

The binding legal principles established are: (1) The placaeten of 1658 and 1696, which restricted lessees' rights to claim compensation for improvements and abolished the enrichment lien, apply only to agricultural/rural leases and not to urban leases. (2) Lessees of urban property retain the original Roman-Dutch law right to an enrichment lien (ius retentionis) allowing them to retain possession of leased property until compensated for necessary and useful improvements effected during the lease. (3) Dutch legislation of the 17th century must be interpreted according to the meaning and scope it bore at the time of promulgation, based on the text, preamble, historical context, and contemporary authoritative commentators. (4) Obiter dicta, even if repeated in multiple cases over many years, do not create binding precedent and can be corrected when shown to be erroneous, unless reliance on them has become so uniform and unbroken as to constitute settled practice.

The court made several significant non-binding observations: (1) The placaeten contain inherent anomalies and inequities (for example, they do not apply to putative lessees under invalid leases, who therefore have better rights than lessees under valid leases). (2) Whether the placaeten should be abolished altogether is a question that may arise but was not before the court. (3) Extending the disadvantages of the placaeten to urban lessees would not resolve their inherent inequities but would simply spread unfairness to a broader category. (4) The anti-discrimination argument (that it is unfair to treat agricultural lessees worse than urban lessees) cannot prevail, as the proper remedy would be to abolish the unfair restrictions on agricultural lessees rather than extend them to others. (5) In modern practice, matters relating to improvements and enrichment liens are typically expressly regulated in lease contracts, which likely explains why the issue has arisen in few reported cases. (6) The maxim communis error facit ius (common error makes law) is dangerous and applies only when usage based on error is truly uniform and unbroken; mere passage of time does not make an erroneous decision sacrosanct.

This case is highly significant in South African law of lease and enrichment. It definitively settled a long-standing controversy by establishing that the Dutch placaeten of 1658 and 1696 (which severely restricted lessees' rights to compensation for improvements and abolished enrichment liens) apply only to agricultural/rural leases and not to urban leases. The judgment corrected a line of obiter dicta dating back over a century and demonstrated the Supreme Court of Appeal's willingness to correct erroneous legal principles even when they appeared to be settled. It restored to lessees of urban property the common law enrichment lien that allows them to retain possession until compensated for improvements. The case is also significant for its methodology in interpreting reception of Roman-Dutch law, emphasizing historical context, original Dutch sources, and the need to interpret 17th century legislation according to its original meaning and purpose. It illustrates the doctrine that common error does not make law (communis error non facit ius) unless the practice is truly uniform and unbroken.