On 26 September 2014, South African Revenue Service (SARS) increased the import duty on beet and cane sugar (HS 1701.12, 1701.13, 1701.14, 1701.91, 1701.99) from 92.6c/kg (approx. USD 0.087 per kg) to 142.5c/kg (approx. US$ 0.129/kg).

The SARS uses a variable tariff formula in order to adjust the import duty to a dollar-based reference price (DBRP). The DBRP represents the lowest duty-free price an importer pays in order to import goods the Southern African Customs Union (SACU). In case the price dips below the DBRP, a duty is levied.
 
Update
On27 February 2015 the import tariff was increased to 207.1c/kg (approx. US$ 0.174/kg), see related measure.