Goods exempted from sales tax are being listed in the Sales Tax (Exemption) Order 1988.
Export Duty
Column 5 of the "First Schedule to the Customs Duties Order of 1988" indicates the rate of export duty applicable to a particular type of goods. The word nil in column (5) appearing against any type of goods in the first schedule denotes that no export duty is leviable on that particular type of goods.