Positions in different commodities cannot be offset for the purpose of calculating the open-positions as described in paragraph CA-6.2.1 above. However, where one or more sub-categories² of the same category is in effect and are directly deliverable against each other, netting between those sub-categories is permitted. Furthermore, if two or more sub-categories of the same category is considered as close substitutes for each other, and minimum correlation of 0.9 between their price movements is clearly established over a minimum period of one year, the bank may, with the prior written approval of the Agency, net positions in those sub-categories.

² Commodities can be grouped into clan, families, sub-groups and individual commodities. For example, a clan might be Energy Commodities, within which Hydro-Carbons is a family with Crude Oil being a sub-group and West Texas Intermediate, Arabian Light and Brent being individual commodities.