The SOCMA web site today announced that the registration for the 2013 Chemical Sector Security Summit (July 10-11, 2013) is now open. They have provided a link to the 2013 CSSS site which, in turn, has a link to the registration page. Registration is still free, but only pre-registered personnel will be allowed into the CSSS. The block of rooms at the Hyatt Regency Baltimore will only be held open until June 10th, so you need to register early.
There is not currently any information on the DHS 2013 CSSS web page reflecting this information.\