Each Bank shall maintain at all times:

(a) Total capital in an amount at least equal to 4.0 percent of the Bank's total assets; and

(b) A leverage ratio of total capital to total assets of at least 5.0 percent of the Bank's total assets. For purposes of determining this leverage ratio, total capital shall be computed by multiplying the Bank's permanent capital by 1.5 and adding to this product all other components of total capital.