CA-A.3.2
Banks are allowed three classes of capital instruments (see section CA-2.2) to meet their capital requirements for credit risk and market risk, as set out below:
Tier 1: Core capital — May be used to support credit risk and market risk;
Tier 2: Supplementary capital — May be used to support credit risk and market risk; and
Tier 3: Ancillary capital — May be used solely to support market risk.