On February 25th, NYSE Regulation advised members of recent amendments to NYSE Rule 1600 governing the New York Block Exchange. Rule 1600 has been amended, effective February 28, 2011, to add provisions on short sales in order to implement the provisions of Rule 201 of Regulation SHO (Rule 201), which, if triggered, imposes a restriction on the prices at which securities may be sold short. NYSE Regulation Information Memo 11-07. Rules 201 and 200(g) of Regulation SHO are currently scheduled to become effective on February 28, 2011, and members must have adequate written compliance and supervisory policies and procedures related to these new requirements in place by that time. In connection with the amended requirements of Regulation SHO, the Exchange has also amended Rules 440B and 123C, effective February 28, 2011. NYSE Regulation Information Memo 11-06.