On September 30th, NYSE Regulation advised members of recent amendments to NYSE and NYSE Amex Equities Rule 107B (Supplemental Liquidity Providers). The amendments modify the quoting requirement applicable to Supplemental Liquidity Providers ("SLPs"); add, for NYSE SLPs only, a requirement that the SLP provide average daily volume of more than 10 million shares for all assigned SLP securities on a monthly basis; clarify which mnemonics may be used for SLP trading activity; and revise the non-regulatory penalties associated with the SLP program to align them with the new quoting and volume requirements. The amendments to both versions of Rule 107B are effective October 1, 2010. NYSE Regulation Information Memo 10-41.