What are the requirements of Rule 15c2-11(f)(3), the "piggyback" exception?Answer: If a broker/dealer is relying on the Rule 15c2-11(f)(3) exception, the security must be quoted in the same interdealer quotation medium as the intended quotation during the past 30 calendar days, and that during those 30 days the security had to be quoted on at least 12 days without more than four consecutive business days without quotations.