Tier 2 capital, or supplementary capital, includes a number of important and legitimate constituents of a bank's capital requirement.[1][note 1] These forms of banking capital were largely standardized in the Basel I accord, issued by the Basel Committee on Banking Supervision and left untouched by the Basel II accord. National regulators of most countries around the world have implemented these standards in local legislation. In the calculation of regulatory capital, Tier 2 is limited to 100% of Tier 1 capital.
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