What is the significance of South African wine labels such as "Wine of Origin" and "Cape Winelands"?

In South African the boards, such as "Wine of Origin" and "Cape Wineland", are regulated by the Wine and Spirit Board, which means that the wine was produced from the particular region and has the quality that it has. "Wine of Origin" means that at least 85% of the grapes has to be taken from a particular area; the label "Cape Winelands" refers to the wines from Western Cape Province - the leading South African wine-making region.