The recent investor–state arbitration claim of Piero Foresti, Laura De Carli and others v. Republic of South Africa considers the extent to which international human rights obligations might be compromised by investor protections. In this regard, the paper examines the investor protection known as fair and equitable treatment (FET). It addresses this treatment obligation in the context of the South Africa–Italy bilateral investment treaty, and its invocation by investors who feel wronged by South Africa's black economic empowerment policies. It analyses the main interpretative theories of the FET clause, and concludes that it is to be interpreted as a self-contained treaty standard. This sui generis approach to interpreting FET clauses more accurately reflects the intentions of the state parties. Such a view supports the conclusion that international human rights should be considered in the interpretation of the FET clause.