Article 383p 2.

To assign a risk exposure to a sector, institutions shall rely on a classification that is commonly used in the market for grouping issuers by sector. Institutions shall assign each issuer to only one of the sector buckets set out in Table 1. Risk exposures from any issuer that an institution cannot assign to a sector in such a manner shall be assigned to either bucket 11 or bucket 20 in Table 1, depending on the credit quality of the issuer.