2. Commission as follows...
a. 3% on all orders generated if sold at the current 'Export price list' price.
b. 2% on all orders generated if the customer received a discount and paid less than the current Export price list.
c. 2% on all world sales received with the exception of the UK, USA and China.
d. These terms are valid for 12 months and can be re-negotiated by Tetrad International and the said employee annually.