On February 26th, NYSE Regulation advised members that, effective March 1, 2010, New York Stock Exchange and NYSE Amex LLC will modify their closing procedures pursuant to an amendment of NYSE and NYSE Amex Equities Rules 123C. Conforming amendments were also made to NYSE and NYSE Amex Equities Rules 13 and Rules 15. These modifications to the closing procedures and the corresponding rule amendments contain significant changes to the way in which the close of trading is handled on the exchanges. NYSE Information Memo 10-11.