The New York Stock Exchange has amended its Rule 92, which prohibits NYSE members from trading for their own account ahead of, or along with, customer orders executable at the same price. Prior to the amendment, Rule 92 frequently prevented a specialist from trading after hours in any security in which the specialist was registered, if that specialist was holding unexecuted customer orders on its book, because the rule’s application was not limited to market hours. As amended, Rule 92 will permit specialists to trade for their dealer accounts after hours (between the hours of 6 p.m. and 9:15 a.m. ET), notwithstanding unexecuted customer interest on the specialist’s book.

http://a257.g.akamaitech.net/7/257/2422/01jan20071800/edocket.access.gpo.gov/2007/pdf/E7-14249.pdf