Ynuico Limited, a supplier of tea in South Africa, challenged the constitutionality of section 2(1)(b) of the Import and Export Control Act 45 of 1963. That provision empowers the Minister of Trade and Industry to prohibit the importation of specified goods, including tea, except under permit conditions determined by the Minister. Acting under this power, the Minister had issued a notice in 1988 restricting tea imports. Ynuico was refused a permit to import foreign tea unless it first purchased a prescribed percentage of locally produced tea. In proceedings before the Transvaal Provincial Division, the constitutionality of section 2(1)(b) was referred to the Constitutional Court for determination.