On March 17th, the SEC granted immediate effectiveness to the New York Stock Exchange's proposed amendment of Rule 36 to: expand the persons with whom Designated Market Marker (DMM) unit personnel on the Exchange Floor may communicate to include persons providing "non-trading related services" to the DMM Unit; and expand the means of permissible communication to include written electronic communications between the DMM unit's post location on the floor and specified off-floor personnel. The Exchange believes that expanding the universe of persons with whom and the means by which DMMs on the Floor of the Exchange may communicate will both allow DMMs to operate more efficiently and enhance the audit trail associated with DMM communications, thus strengthening the regulatory program associated with reviewing such communications. Comments should be submitted on or before April 12, 2011. SEC Release No. 34-64088. On March 17th, the SEC granted immediate effectiveness to a similar proposal by NYSE Amex. SEC Release No. 34-64089.