On January 20, 2012, the Minister of Finance annouced the minimum thresholds for each of the designated sectors:

• Textile, clothing, leather and footwear - 100%
• Power pylons - 100%
• Rolling stock - 65%
• Canned / processed vegetables - 80%
• Busses (Bus body) - 80%

For a copy of the circular: http://www.treasury.gov.za/divisions...Jan%202012.pdf