This document contains a set of updates to the base syntax for CMC@ a Certificate Management protocol using the Cryptographic Message Syntax (CMS). This document updates RFC 5272@ RFC 5273@ and RFC 5274. The new items in this document are: new controls for future work in doing server side key generation@ definition of a Subject Information Access value to identify CMC servers@ and the registration of a port number for TCP/IP for the CMC service to run on.