Uhlelo lobandlululo, olwaziwa ngolimi lwesiBhunu ngokuthi yi-apartheid, okuyigama elisho "isimo sokwehlukanisa", kwakuwuhlelo lokwehlukanisa izakhamizi zaseNingizimu Afrika ngokobuhlanga. Lokhu kwakwenziwa ngamandla emithetho yeNational Party, okwakuyiyona eyayibusa ukusuka nge-1948  ukuya nge-1994. Ngaphansi kohlelo lobandlululo, amalungelo, izinhlangano kanye nokunyakaza kwazakhamizi eziningi ezimpisholo nezinye izinhlanga kwancishiswa kwasekuthi umbuso wedlanzana lamaBhunu kwabayiwona osimamiswayo. Umbuso wobandululo waqala ngemuva kwempi yesibili yomhlaba yiNational Party eyayiholwa ngamaBhunu kanye nenhlangano yeAfrikaner-Broederbond. Lo mcabango wokubusa izakhamizi ngokwahlukanisa waqhutshekiselwa phambili naseNingizimu Ntshonalanga Afrika, eyayenganyelwe yiNingizimu Afrika ngaphansi kwegunya leLeague of Nations (elachithwa  ngo-1966 nge-United Nations General Assembly Resolution 2145), yaze yathola ukuzimela njengeNamibhiya ngo-1990. Igama elithi ubandlululo lisetshenziswa namuhla ukubhekisa ezinhlotsheni ezahlukene zokwahlukanisa, okumiswa yiziphathimandla zikahulumeni kulelo zwe, okuphikisana namalungelo omphakathi nawezakhamizi ezisemaqenjini athile, ngenxa yokubandlulula ngokohlobo. Ubandlululo ngokobuhlanga eNingizimu Afrika kwaqala ngezikhathi zamakholoniyali ngaphansi kwamaDashi, kwaze kwaba ngo-1795 ngenkathi amaNgisi ethatha elaseCape of Good Hope. Uhlelo lobandlululo njengomgomo osemthethweni lwaqala ukusetshenziswa ngemuva kokhetho luka-1948.